上游原料
2,2-dichloroacetyl chloride; dichloroacetyl chloride(7R)-7-acetyl-5,7-dihydroxy-4a,6a-dimethyl-4b,5,6,6a,7,8,9,10,10a,10b,11,12-dodecahydro-2(4aH)-chrysenone(7R)-7-acetyl-7-hydroxy-4a,6a-dimethyl-2-oxo-2,4a,4b,5,6,6a,7,8,9,10,10a,10b,11,12-tetradecahydro-5-chrysenyl 2,2-dichloroacetate(1R)-1-acetyl-11-[(2,2-dichloroacetyl)oxy]-10a,12a-dimethyl-8-oxo-1,2,3,4,4a,4b,5,6,8,10a,10b,11,12,12a-tetradecahydro-1-chrysenyl butyrate
