Showing structure for (1r,3s)-1-[(1s,2s,4r,5s)-4-(acetyloxy)-5-[(acetyloxy)methyl]-1,2,5-trimethyl-6-oxo-3,4,7,8-tetrahydro-2h-naphthalen-1-yl]-3-hydroxy-3-methylpent-4-en-1-yl acetate