Maoka Takashi, Akimoto Naoshige, Ishiguro Koji, Yoshinaga Masaru, Yoshimoto Makoto
Research Institute for Production Development, 15 Shimogamo-morimoto-cho, Sakyo-ku, Kyoto 606-0805, Japan.
Phytochemistry. 2007 Jul;68(13):1740-5. doi: 10.1016/j.phytochem.2007.03.019. Epub 2007 Apr 26.
A series of carotenoids with a 5,6-dihydro-5,6-dihydroxy-beta-end group, named ipomoeaxanthins A (1), B (2), C1 (3) and C2 (4) were isolated from the flesh of yellow sweet potato "Benimasari", Ipomoea batatas Lam. Their structures were determined to be (5R,6S,3'R)-5,6-dihydro-beta,beta-carotene-5,6,3'-triol (1), (5R,6S,5'R,6'S)-5,6,5',6'-tetrahydro-beta,beta-carotene-5,6,5'6'-tetrol (2), (5R,6S,5'R,8'R)-5',8'-epoxy-5,6,5',8'-tetrahydro-beta,beta-carotene-5,6-diol (3), and (5R,6S,5'R,8'S)-5',8'-epoxy-5,6,5',8'-tetrahydro-beta,beta-carotene-5,6-diol (4) by UV-Vis, NMR, MS and CD data.
从黄肉甘薯“Benimasari”（Ipomoea batatas Lam.）中分离出一系列具有5,6-二氢-5,6-二羟基-β-末端基团的类胡萝卜素，命名为甘薯黄质A（1）、B（2）、C1（3）和C2（4）。通过紫外可见光谱、核磁共振、质谱和圆二色光谱数据确定它们的结构分别为(5R,6S,3'R)-5,6-二氢-β,β-胡萝卜素-5,6,3'-三醇（1）、(5R,6S,5'R,6'S)-5,6,5',6'-四氢-β,β-胡萝卜素-5,6,5',6'-四醇（2）、(5R,6S,5'R,8'R)-5',8'-环氧-5,6,5',8'-四氢-β,β-胡萝卜素-5,6-二醇（3）和(5R,6S,5'R,8'S)-5',8'-环氧-5,6,5',8'-四氢-β,β-胡萝卜素-5,6-二醇（4）。
