rac-(4aR,5S,6aS,8R,10aR)-4a-(3-aminopropyl)-8-methyl-3-oxooctahydro-1H,6H-spiro[indeno[1,7a-b]pyran-10,2'-[1,3]dioxolan]-5-yl acetate

rac-tert-butyl (3-((3aR,6S,7aR)-3a-(3-(benzyloxy)propyl)-6-methyl-1,3a,5,6,7,7a-hexahydrospiro[indene-4,2'-[1,3]dioxolan]-3-yl)propyl)carbamate

rac-tert-butyl (3-((2R,3S,3aR,6S,7aR)-3a-(3-(benzyloxy)propyl)-2,3-dihydroxy-6-methyloctahydrospiro[indene-4,2'-[1,3]dioxolan]-3-yl)propyl)carbamate