Showing structure for (3R,3aS,4S,4aR,5S,8S,8aR,9R,9aS)-5,9-dihydroxy-4-(isobutyryloxy)-3,5,8a-trimethyl-2-oxododecahydronaphtho[2,3-b]furan-8-yl 4-(4-(bis(2-chloroethyl)amino)phenyl)butanoate