title: Spectroscopic, stability and radical-scavenging properties of a novel pigment from gardenia.
abstract: A novel pigment, named gardecin, has been isolated from gardenia fruits, together with another five known crocins. The pigment, which possessed a structure which is unique among crocins, was characterised using spectrometric techniques, particularly 1D and 2D NMR. The NMR assignments were based on data from (1)H NMR, (13)C NMR, DEPT, (1)H-(1)H COSY, NOESY, HMQC and HMBC measurements. The five known crocins were identified on the basis of MS, UV/visible and 1D NMR data. Chemical stability and antioxidant ability of gardecin in comparison with the other five crocins were studied. The stronger DPPH free radical-scavenging ability of gardecin compared, with the other crocins, was observed. Kinetic studies have shown that all crocins were unstable under various conditions, but surprisingly gardecin was fairly stable.
authors.affiliation: West China School of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, PR China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Chen
authors.affiliation: West China School of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, PR China.
authors.forename: Le
authors.initials: L
authors.lastname: Cai
authors.affiliation: West China School of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, PR China.
authors.forename: Can
authors.initials: C
authors.lastname: Zhao
authors.affiliation: West China School of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, PR China.
authors.forename: Hui-Chuan
authors.initials: HC
authors.lastname: Xu
authors.affiliation: West China School of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, PR China.
authors.forename: Cheng-Yong
authors.initials: CY
authors.lastname: Cao
authors.affiliation: West China School of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, PR China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
authors.affiliation: West China School of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, PR China.
authors.forename: Lin
authors.initials: L
authors.lastname: Jia
authors.affiliation: West China School of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, PR China.
authors.forename: Hong-Xiang
authors.initials: HX
authors.lastname: Yin
authors.affiliation: West China School of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, PR China.
authors.forename: Chu
authors.initials: C
authors.lastname: Chen
authors.affiliation: West China School of Pharmacy, Sichuan University, No. 17, Duan 3, Renmin Nan Road, Chengdu 610041, PR China. Electronic address: Zhanghhx@vip.sina.com.
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang
keywords: Antioxidant; Crocin; Gardecin; Gardenia jasminoides; Pigment; Spectroscopic; Stability; Structure elucidation