Showing structure for 1-[4-(3-hydroxy-4-methyl-5-oxooxolan-3-yl)-4-oxobutan-2-yl]-3a,6,6,9a,11a-pentamethyl-1h,2h,3h,4h,5h,5ah,7h,8h,9h,10h,11h-cyclopenta[a]phenanthren-7-yl 1-methyl propanedioate