tert-butyl (9aS,11R,13aS)-11-methyl-13-oxo-2,3,6,7,9,9a,10,11,12,13-decahydro-1H-indeno[1,7a-e]azonine-4(5H)-carboxylate

(3aS,6R,7aR)-3a-allyl-6-methylhexahydrospiro[indene-4,2'-[1,3]dioxolan]-3(3aH)-one

(1aR,2aS,4R,6aS,13aS)-4-methyl-10-(2,2,2-trifluoroacetyl)dodecahydro-6H,7H-oxireno[2',3':1,2]indeno[1,7a-e]azonin-6-one