Some of them
showed marked Nerve Growth Factor (NGF) enhancement activity,
which is of great value for generating a new type of drugs aimed at
medical treatment for serious neurological disorders (Li and
Ohizumi, 2004). As a continuation of our study of this plant species
(Zhang et al., 2009b), the isolation and structure elucidation of
eight previously unreported iridoids are reported, including six
aglycones geleganoids A–F (1–3, 6–8), and two glycosides, geleganosides
A and B (4, 5), along with three previously reported ones unsaturation (as well as the absence of a double bond), and the
downfield shift of H-6 and C-6 indicated the presence of a c-lactone
which was confirmed by the HMBC correlation between H-6
(dH 4.75) and C-11 (dC 178.02). HMBC correlations between the
proton signal at dH 5.30 (H-3) and the carbon signals at dC 178.02
(C-11) and dC 59.79 (C-1) supported the location of the hemiacetal
hydroxyl at C-3. The correlations of H-7(dH 3.83)/C-6 (dC 84.07), C-8
(dC 42.25) and C-10 (dC 8.66) and H-4 (dH 2.90), H-5 (dH 2.85), H-6
(dH 4.75), H-8 (dH 1.72), and Me-10 (dH 0.95)/C-9 (dC 72.18) suggested
that the other two hydroxyls were substituted at C-7 and
C-9, respectively (Fig. 2)
Some of them
showed marked Nerve Growth Factor (NGF) enhancement activity,
which is of great value for generating a new type of drugs aimed at
medical treatment for serious neurological disorders (Li and
Ohizumi, 2004). As a continuation of our study of this plant species
(Zhang et al., 2009b), the isolation and structure elucidation of
eight previously unreported iridoids are reported, including six
aglycones geleganoids A–F (1–3, 6–8), and two glycosides, geleganosides
A and B (4, 5), along with three previously reported ones unsaturation (as well as the absence of a double bond), and the
downfield shift of H-6 and C-6 indicated the presence of a c-lactone
which was confirmed by the HMBC correlation between H-6
(dH 4.75) and C-11 (dC 178.02). HMBC correlations between the
proton signal at dH 5.30 (H-3) and the carbon signals at dC 178.02
(C-11) and dC 59.79 (C-1) supported the location of the hemiacetal
hydroxyl at C-3. The correlations of H-7(dH 3.83)/C-6 (dC 84.07), C-8
(dC 42.25) and C-10 (dC 8.66) and H-4 (dH 2.90), H-5 (dH 2.85), H-6
(dH 4.75), H-8 (dH 1.72), and Me-10 (dH 0.95)/C-9 (dC 72.18) suggested
that the other two hydroxyls were substituted at C-7 and
C-9, respectively (Fig. 2)
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Some of them
showed marked Nerve Growth Factor (NGF) enhancement activity,
which is of great value for generating a new type of drugs aimed at
medical treatment for serious neurological disorders (Li and
Ohizumi, 2004). As a continuation of our study of this plant species
(Zhang et al., 2009b), the isolation and structure elucidation of
eight previously unreported iridoids are reported, including six
aglycones geleganoids A–F (1–3, 6–8), and two glycosides, geleganosides
A and B (4, 5), along with three previously reported ones unsaturation (as well as the absence of a double bond), and the
downfield shift of H-6 and C-6 indicated the presence of a c-lactone
which was confirmed by the HMBC correlation between H-6
(dH 4.75) and C-11 (dC 178.02). HMBC correlations between the
proton signal at dH 5.30 (H-3) and the carbon signals at dC 178.02
(C-11) and dC 59.79 (C-1) supported the location of the hemiacetal
hydroxyl at C-3. The correlations of H-7(dH 3.83)/C-6 (dC 84.07), C-8
(dC 42.25) and C-10 (dC 8.66) and H-4 (dH 2.90), H-5 (dH 2.85), H-6
(dH 4.75), H-8 (dH 1.72), and Me-10 (dH 0.95)/C-9 (dC 72.18) suggested
that the other two hydroxyls were substituted at C-7 and
C-9, respectively (Fig. 2)
การแปล กรุณารอสักครู่..

Some of them
showed marked Nerve Growth Factor (NGF) enhancement activity,
which is of great value for generating a new type of drugs aimed at
medical treatment for serious neurological disorders (Li and
Ohizumi, 2004). As a continuation of our study of this plant species
(Zhang et al., 2009b), the isolation and structure elucidation of
eight previously unreported iridoids are reported,รวมทั้งหก
aglycones geleganoids A ) F ( 1 - 3 , 6 - 8 ) และสอง glycosides geleganosides
A และ B ( 4 , 5 ) , ตามด้วยสามรายงานก่อนหน้านี้ที่ไม่อิ่มตัว ( รวมทั้งไม่มีพันธะคู่ ) และ
ร่นกะของ H-6 c-6 แสดงตนและ ของ c-lactone
ซึ่งได้รับการยืนยัน โดยความสัมพันธ์ระหว่างฤทธิ์ H-6
( DH 4.75 ) และ c-11 ( DC 178.02 ) ความสัมพันธ์ระหว่าง
ฤทธิ์โปรตอนสัญญาณที่ DH 5.30 ( h-3 ) และคาร์บอนสัญญาณที่ DC 178.02
( c-11 ) และ DC 59.79 ( c-1 ) รองรับที่ตั้งของไฮดรอกซิลให้เ ิอะซิทัล
ที่ c-3 . ความสัมพันธ์ของ h-7 ( DH 3.83 ) / c-6 ( DC ความรอบรู้ ) c-8
( 42.25 DC ( DC ) และ c-10 หัวข้อ ) และ h-4 ( DH 2.90 ) h-5 ( DH 2.85 ) , H-6
( DH 4.75 ) h-8 ( DH 1.72 ) และ me-10 ( DH 0.95 ) / c-9 ( DC 72.18
) แนะนำthat the other two hydroxyls were substituted at C-7 and
C-9, respectively (Fig. 2)
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