(3S,4R)-allyl 3-(tert-butyldimethylsiloxy)-4-{(S)-2-[(R)-2-[(S,E)-3-(4-methoxybenzyloxy)-7-(tritylthio)hept-4-enoylamino]propionylamino]-3-tritylthio(propionylamino)}-5-methylhexanoate

(3S,4R)-allyl 3-(tert-butyldimethylsiloxy)-4-{(S)-2-[(R)-2-[(S,E)-3-hydroxy-7-(tritylthio)hept-4-enoylamino]propionylamino]-3-tritylthio(propionylamino)}-5-methylhexanoate

(7S,11R,14S,17R,18S,E)-18-(tert-butyldimethylsilyloxy)-7-hydroxy-17-isopropyl-11-methyl-9,12,15-trioxo-1,1,1-triphenyl-14-tritylthiomethyl-2-thia-10,13,16-triazaicos-5-en-20-oic acid

(2S,6R,9S,12R,13S)-13-(tert-butyldimethylsiloxy)-12-isopropyl-6-methyl-2-[(E)-4-(tritylthio)but-1-enyl]-9-(tritylthiomethyl)-1-oxa-5,8,11-triazacyclopentadecane-4,7,10,15-tetraone

(1S,5S,6R,9S,20R,E)-5-(tert-butyldimethylsilyloxy)-6-isopropyl-20-methyl-2-oxa-11,12-dithia-7,19,22-triazabicyclo[7.7.6]docos-15-ene-3,8,18,21-tetraone