2R-isopropyl-6R-methyl-13S-triisopropylsilanyloxy-2S-[4-(triphenyl-λ-sulfanyl)but-1E-enyl]-9S-tritylsulfanylmethyl-1-oxa-5,8,11-triazacyclopentadecane-4,7,10,15-tetraone

(2E)-5-[(triphenylmethyl)thio]-2-pentenal

(3S,4R)-4-(tert-butoxycarbonylamino)-3-hydroxy-5-methylhexanoic acid methyl ester

(3S,4E)-3-hydroxy-1-((4R)-4-isopropyl-2-thioxothiazolidin-3-yl)-7-tritylsulfanyl-hept-4-en-1-one

4R-[2-(9H-fluoren-9-ylmethoxycarbonylamino)-3S-tritylsulfanylpropionylamino]-3S-hydroxy-5-methylhexanoic acid 2,2,2-trichloroethyl ester