Davallinsaeure-methylester 在
chromium(VI) oxide 、
溶剂黄146 作用下,
生成 (3R,3aR,5aR,5bR,7aR,8S,11aS,13aS,13bR)-3-Isopropyl-3a,5a,8,11a,13a-pentamethyl-13-oxo-2,3,3a,4,5,5a,5b,6,7,7a,8,9,10,11,11a,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysene-8-carboxylic acid methyl ester