TWO NEW CERAMIDES FROM Zephyranthes candida

摘要

Two new ceramides were isolated from the bulbs of Zephyranthes candida. Their structures were established as (2S, 3S, 4R, 13E)-1,3,4-trihydroxy-2-[(2'R)-2'-hydroxytetracosanoylamino]-13-octadece ne, named zephyranamide A (1) and (2S, 3S, 4R)-1,3,4-trihydroxy-2-octacosanoylaminohexadecene, named zephyranamide B (2). The structures of the new compounds were elucidated by spectral techniques including H-1 NMR, C-13 NMR, as well as HSQC, HMBC, DEPT, and COSY.