两种小分子肽，需要订购。文献合成路线仅供参考：

CTT-54:  A targeted low molecular
weight near-infrared fluorescent probe for prostate cancer;\

Cys-CO-Glu: N-[N-[(S)-1,3-Dicarboxypropyl]Carbamoyl]-4-[ 18 F]Fluorobenzyl- L -Cysteine, [ 18 F]DCFBC: A New Imaging Probe for Prostate Cancer