(3beta(S),4alpha,6alpha,7alpha,15alpha(R),16beta)-4,9-Epoxycevane-3,4,6,7,14,15,16,20-octol 6,7-diacetate 3-(2-hydroxy-2-methylbutyrate) 15-(2-methylbutyrate) 11016-42-5 1360-61-8 143-57-7 4-21-00-06845