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

rac-(2R,3S,3aR,6S,7aR)-3a-(3-(benzyloxy)propyl)-3-(3-((tert-butoxycarbonyl)amino)propyl)-3-hydroxy-6-methyloctahydrospiro[indene-4,2'-[1,3]dioxolan]-2-yl acetate

3-[(3aS,6R,7aS)-3-(3-Amino-propyl)-6-methyl-4-oxo-1,4,5,6,7,7a-hexahydro-inden-3a-yl]-propionic acid 2,5-dioxo-pyrrolidin-1-yl ester; compound with trifluoro-acetic acid

(1S,2S,4R,6S)-2-Hydroxy-4-methyl-13-aza-tricyclo[7.7.0.01,6]hexadec-8-en-14-one