[(19S)-19-ethyl-14,18-dioxo-17-oxa-3,13-diazapentacyclo[11.8.0.02,11.04,9.015,20]henicosa-1(21),2,4,6,8,10,15(20)-heptaen-19-yl] (2S)-2-[[2-[2-[2-[[(2S)-1-[[(19S)-19-ethyl-14,18-dioxo-17-oxa-3,13-diazapentacyclo[11.8.0.02,11.04,9.015,20]henicosa-1(21),2,4,6,8,10,15(20)-heptaen-19-yl]oxy]-1-oxopropan-2-yl]amino]-2-oxoethoxy]ethoxy]acetyl]amino]propanoate
Pegamotecan has been used in trials studying the treatment of Cancer of Stomach, Sarcoma, Soft Tissue, and Gastroesophageal Cancer.