Showing structure for (2r,2as,3s,4s,5as,5br,7as,8s,11as,11br,13s,13as)-3-acetyl-13-(acetyloxy)-8-ethyl-2-hydroxy-5b,8,11a-trimethyl-hexadecahydrocyclobuta[i]chrysen-4-yl (3s)-3-hydroxybutanoate