(9H-fluoren-9-yl)methyl (R)-2'-(((S,E)-3-hydroxy-7-(tritylthio)hept-4-enamido)methyl)-4-methyl-4,5-dihydro-[2,4'-bithiazole]-4-carboxylate

2-((12Z,22Z,24R,5S,8S)-8-((E)-4-mercaptobut-1-en-1-yl)-24-methyl-3,6,10-trioxo-24,25-dihydro-7-oxa-4,11-diaza-1(4,2),2(2,4)-dithiazolacyclododecaphane-5-yl)acetic acid