Methanolic extracts of Japanese M. obovatawas subjected to HPLC to determine levels of several neolignans, magnolol (7.65%), honokiol (0.55%), 4-O-methylhonokiol (0.012%) and obovatol (0.33%) (Matsuda et al., 2001). Moreover, Min (2008) found that methanolic extracts of Japanese M. obovata were composed ofmagnolol (2%), honokiol (1.25%), 4-O methylhonokiol (0.21%) and obovatol (0.125%). Choi et al. (2009) found thatmethanolic extracts of Korean M. obovata were composed of magnolol (0.78%), honokiol (1.25%), 4-O-methylhonokiol (0.13%) and obovatol (0.078%). Yahara et al. (1991) found thatmethanolic extracts of Chinese M. officinalis were composed ofmagnolol (1%), honokiol (0.17%)
and 4-O-methylhonokiol (0.0003%). We recently found that ethanolic extracts of Chinese M. officinalis were composed of magnolol (1.25%), honokiol (1.81%) and 4-O-methylhonokiol (1.24%) (Lee et al., 2009e). These quantitative and qualitative differences of components from Magnolia bark are proposed to be due to studying different Magnoliaspecies, different extracting solvents and different analytic methods or different growing areas. For example, obovatol was extracted from M. obovata but not from M. officinalis (Table 1). The structure of magnolol was determined to be 5,5′-diallyl-2,2′-dihydroxybiphenyl. The structure of honokiol was determined to be 3,5′-diallyl-4,2′-dihydroxybiphenyl
(Bang et al., 2000). The structure of obovatol was determined to be 4′,5- diallyl-2,3-dihydroxybiphenyl ether. The structure of 4-O-methylhonokiol was determined to be 3,5′-diallyl-2′-hydroxy-4-methoxybiphenyl which has been referred to as 4-methoxyhonokiol or 6′-O-methylhonokiol (Yahara et al., 1991;Min, 2008; Zhou et al., 2008; Oh et al., 2009),
as shown in Fig. 1. Also from Magnoliaceous plants are methyl caffeate, denudatin B, sinapyl alcohol, the germacranolide sesquiterpene lactones (costunolide, parthenolide and costunolide dipoxide) and lignans (eudesmin, magnolin, yangambin and epimagnolin B. These were isolated as novel compounds (el-Feraly & Chan, 1978; Teng et al., 1990;
Pyo et al., 2002; Choi et al., 2004; Kim et al., 2009). In addition, to increase the activity of Magnolia-originated components, novel derivatives have been synthesized and combined with other drug/delivery systems for magnolol (Wang et al., 2002; Li et al., 2003), honokiol (Amblard et al., 2007; Hou et al., 2008; Kim et al., 2010; Zheng et al.,
2010) and obovatol (Yu et al., 2009). Therefore, it is important to develop isolation methods to increase the effects and activities of each component.
Methanolic extracts of Japanese M. obovatawas subjected to HPLC to determine levels of several neolignans, magnolol (7.65%), honokiol (0.55%), 4-O-methylhonokiol (0.012%) and obovatol (0.33%) (Matsuda et al., 2001). Moreover, Min (2008) found that methanolic extracts of Japanese M. obovata were composed ofmagnolol (2%), honokiol (1.25%), 4-O methylhonokiol (0.21%) and obovatol (0.125%). Choi et al. (2009) found thatmethanolic extracts of Korean M. obovata were composed of magnolol (0.78%), honokiol (1.25%), 4-O-methylhonokiol (0.13%) and obovatol (0.078%). Yahara et al. (1991) found thatmethanolic extracts of Chinese M. officinalis were composed ofmagnolol (1%), honokiol (0.17%)and 4-O-methylhonokiol (0.0003%). We recently found that ethanolic extracts of Chinese M. officinalis were composed of magnolol (1.25%), honokiol (1.81%) and 4-O-methylhonokiol (1.24%) (Lee et al., 2009e). These quantitative and qualitative differences of components from Magnolia bark are proposed to be due to studying different Magnoliaspecies, different extracting solvents and different analytic methods or different growing areas. For example, obovatol was extracted from M. obovata but not from M. officinalis (Table 1). The structure of magnolol was determined to be 5,5′-diallyl-2,2′-dihydroxybiphenyl. The structure of honokiol was determined to be 3,5′-diallyl-4,2′-dihydroxybiphenyl(Bang et al., 2000). The structure of obovatol was determined to be 4′,5- diallyl-2,3-dihydroxybiphenyl ether. The structure of 4-O-methylhonokiol was determined to be 3,5′-diallyl-2′-hydroxy-4-methoxybiphenyl which has been referred to as 4-methoxyhonokiol or 6′-O-methylhonokiol (Yahara et al., 1991;Min, 2008; Zhou et al., 2008; Oh et al., 2009),as shown in Fig. 1. Also from Magnoliaceous plants are methyl caffeate, denudatin B, sinapyl alcohol, the germacranolide sesquiterpene lactones (costunolide, parthenolide and costunolide dipoxide) and lignans (eudesmin, magnolin, yangambin and epimagnolin B. These were isolated as novel compounds (el-Feraly & Chan, 1978; Teng et al., 1990;Pyo et al., 2002; Choi et al., 2004; Kim et al., 2009). In addition, to increase the activity of Magnolia-originated components, novel derivatives have been synthesized and combined with other drug/delivery systems for magnolol (Wang et al., 2002; Li et al., 2003), honokiol (Amblard et al., 2007; Hou et al., 2008; Kim et al., 2010; Zheng et al.,2010) and obovatol (Yu et al., 2009). Therefore, it is important to develop isolation methods to increase the effects and activities of each component.
การแปล กรุณารอสักครู่..
Methanolic extracts of Japanese M. obovatawas subjected to HPLC to determine levels of several neolignans, magnolol (7.65%), honokiol (0.55%), 4-O-methylhonokiol (0.012%) and obovatol (0.33%) (Matsuda et al., 2001). Moreover, Min (2008) found that methanolic extracts of Japanese M. obovata were composed ofmagnolol (2%), honokiol (1.25%), 4-O methylhonokiol (0.21%) and obovatol (0.125%). Choi et al. (2009) found thatmethanolic extracts of Korean M. obovata were composed of magnolol (0.78%), honokiol (1.25%), 4-O-methylhonokiol (0.13%) and obovatol (0.078%). Yahara et al. (1991) found thatmethanolic extracts of Chinese M. officinalis were composed ofmagnolol (1%), honokiol (0.17%)
and 4-O-methylhonokiol (0.0003%). We recently found that ethanolic extracts of Chinese M. officinalis were composed of magnolol (1.25%), honokiol (1.81%) and 4-O-methylhonokiol (1.24%) (Lee et al., 2009e). These quantitative and qualitative differences of components from Magnolia bark are proposed to be due to studying different Magnoliaspecies, different extracting solvents and different analytic methods or different growing areas. For example, obovatol was extracted from M. obovata but not from M. officinalis (Table 1). The structure of magnolol was determined to be 5,5′-diallyl-2,2′-dihydroxybiphenyl. The structure of honokiol was determined to be 3,5′-diallyl-4,2′-dihydroxybiphenyl
(Bang et al., 2000). The structure of obovatol was determined to be 4′,5- diallyl-2,3-dihydroxybiphenyl ether. The structure of 4-O-methylhonokiol was determined to be 3,5′-diallyl-2′-hydroxy-4-methoxybiphenyl which has been referred to as 4-methoxyhonokiol or 6′-O-methylhonokiol (Yahara et al., 1991;Min, 2008; Zhou et al., 2008; Oh et al., 2009),
as shown in Fig. 1. Also from Magnoliaceous plants are methyl caffeate, denudatin B, sinapyl alcohol, the germacranolide sesquiterpene lactones (costunolide, parthenolide and costunolide dipoxide) and lignans (eudesmin, magnolin, yangambin and epimagnolin B. These were isolated as novel compounds (el-Feraly & Chan, 1978; Teng et al., 1990;
Pyo et al., 2002; Choi et al., 2004; Kim et al., 2009). In addition, to increase the activity of Magnolia-originated components, novel derivatives have been synthesized and combined with other drug/delivery systems for magnolol (Wang et al., 2002; Li et al., 2003), honokiol (Amblard et al., 2007; Hou et al., 2008; Kim et al., 2010; Zheng et al.,
2010) and obovatol (Yu et al., 2009). Therefore, it is important to develop isolation methods to increase the effects and activities of each component.
การแปล กรุณารอสักครู่..
สารสกัดเมทานอลของญี่ปุ่นม. obovatawas ภายใต้ HPLC เพื่อตรวจสอบระดับของหลาย neolignans magnolol , ( 7.65 % ) honokiol ( 0.55 % ) 4-o-methylhonokiol ( 0.012 % ) และ obovatol ( 0.33% ) ( มัตสึดะ et al . , 2001 ) นอกจากนี้ มิน ( 2551 ) พบว่า สารสกัดเมทานอลของญี่ปุ่น ได้แก่ ม. แน่น ofmagnolol ( 2% ) , honokiol ( 1.25% ) 4-o methylhonokiol ( 0.21 % ) และ obovatol ( 0.125 % )Choi et al . ( 2009 ) พบว่าสารสกัดของเกาหลีแน่น thatmethanolic เมตรประกอบด้วย magnolol ( 0.78 % ) honokiol ( 1.25% ) 4-o-methylhonokiol ( 0.13 % ) และ obovatol ( 0.078 % ) yahara et al . ( 1991 ) พบว่าสารสกัดจาก thatmethanolic ภาษาจีนม. ต่อจำนวน ofmagnolol ( 1% ) , honokiol ( 0.17% )
4-o-methylhonokiol ( และ 0.0003 % ) เราเพิ่งพบว่า สารสกัดเอทานอลของภาษาจีนม.officinalis ) ประกอบด้วย magnolol ( 1.25% ) honokiol ( 1.81 % ) และ 4-o-methylhonokiol ( 1.24% ) ( ลี et al . , 2009e ) ทั้งเชิงปริมาณและเชิงคุณภาพความแตกต่างของส่วนประกอบจากแมกโนเลียเห่าจะเสนอเป็นเนื่องจากเรียน magnoliaspecies แตกต่างกันการสกัดตัวทำละลายและวิธีวิเคราะห์ต่างกัน หรือพื้นที่ปลูกแตกต่างกัน ตัวอย่างเช่น obovatol สกัดจากม.แต่ไม่ใช่จากเมตร ความแน่น ( ตารางที่ 1 ) โครงสร้างของ magnolol ถูกกำหนดเป็น 5 , 5 ’ - ’ diallyl-2,2 - dihydroxybiphenyl . โครงสร้างของ honokiol ตัดสินใจว่าจำนวนนั้น - diallyl-4,2 ’ - dihydroxybiphenyl
( บาง et al . , 2000 ) โครงสร้างของ obovatol ตั้งใจจะได้รับ 4 , 5 - diallyl-2,3-dihydroxybiphenyl อีเทอร์ โครงสร้างของ 4-o-methylhonokiol ถูกกำหนดเป็น 3
การแปล กรุณารอสักครู่..