2-[4-[2-[[2-[[2-[[2-[[(2S)-2-amino-3-(4-nitrophenyl)propanoyl]amino]-2-oxoethyl]amino]-2-oxoethyl]amino]-2-oxoethyl]amino]-2-oxoethyl]-7,10-bis(carboxymethyl)-1,4,7,10-tetrazacyclododec-1-yl]acetic acid

1,4,7-三叔丁氧羰基-1,4,7,10-四氮杂环十二烷

1,4,7-tris(tert-butyloxycarbonyl)-1,4,7,10-tetraazacyclododecane

(4,7,10-三叔丁氧羰基-1,4,7,10-四氮杂环癸-1-基)乙酸

1,7-二-(N-叔丁氧羰基甲基)-1,4,7,10-四氮杂环十二烷