K. Tsukida, Masayoshi Ito
1980
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Abstract
The struchure of kitol, a natural retinol dimer, was reinvestigated. Kitol-A an -B were isolated from whale liver and the former was was recognized as “ kitol ” reported so far. Extensive 1H-NMR (200 MHZ) data for kitol-A and its related compounds (retinyl acetate-tetracyanoethylene adduct, -fumaronitrile addcut, and -crotononitrle adduct) were presented and the structure of kitol-A including its stereochemistry was determined decisively. Kitol-B is believed to be the mono-cis isomer of kitol-A.