Compounds containing a carbonyl group adjacent to a double bond
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(10S,13R)-10,13-Dimethyl-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol
1,5-anhydro-2,3-dideoxy-6-O-trityl-D-erythro-hex-2-enitol
