(12R,13S,E)-tert-butyl 12-benzyloxy-2,2,13,23,23-pentamethyl-9,15,21-trioxo-3,3-diphenyl-4,22-dioxa-20-aza-3-silatetracos-10-ene-16-carboxylate

(5S,6R,E)-tert-butyl 6-benzyloxy-13-(tert-butyldiphenylsilyloxy)-5-methyl-3,9-dioxotridec-7-enoate

(3S,4R,E)-4-benzyloxy-11-(tert-butyldiphenylsilyloxy)-3-methyl-7-oxoundec-5-enenitrile

tert-butyl (8R,9S,E)-8-benzyloxy-10-cyano-9-methyl-5-oxodec-6-enyl(3-(tert-butyldimethylsilyloxy)propyl)carbamate

(10aS,11R,12S,14aS)-4-tert-butyl 14a-ethyl 11-benzyloxy-12-methyl-9,14-dioxotetradecahydrobenzo[e][1]azacyclododecine-4,14a(1H)-dicarboxylate