Five Chrysanthemum essential oils were purchased from different companies, including Shanghai Butterfly Trade Co., LTD (NO.1);Guangzhou Guowei Aromatic Technology Co., LTD. (NO.2); Jiangxi Ji’an Red Apple Natural Flavor Oil Co., LTD. (NO.3); Wuhan Yellow Crane Tower Essence Co., LTD. (NO.4); Nanchang Aroma Chemical Co., LTD. (NO.5).