Salmoxanthin, deepoxysalmoxanthin, and 7,8-didehydrodeepoxysalmoxanthin from the Salmon Oncorhynchus keta.
The absolute configuration of salmoxanthin (5,6-epoxy-5,6-dihydro-beta,epsilon-carotene-3,3',6'-triol) (1) first isolated from the salmon Oncorhynchus keta was determined to be 3S, 5R, 6S, 3'S, 6'R. Furthermore, two minor carotenoids, deepoxysalmoxanthin (2) and 7,8-didehydrodeepoxysalmoxanthin (3), were isolated, and their structures were determined to be (3R,3'S,6'R)-beta,epsilon-carotene-3,3',6'-triol and (3R,3'S,6'R)-7,8-didehydro-beta,epsilon-carotene-3,3',6'-triol by (1)H NMR and CD spectroscopy.
Matsuno
T
T
Kyoto Pharmaceutical University, Misasagi, Yamashina, Kyoto 607-8412, Japan.
Tsushima
M
M
Maoka
T
T
D000818:Animals; D002338:Carotenoids / Q000737:chemistry / Q000302:isolation & purification*; D002942:Circular Dichroism; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D012474:Salmon; D021241:Spectrometry, Mass, Electrospray Ionization
D002338:Carotenoids