L-Cysteine, S-[[3-(mercaptomethyl)-5-[[[2-[[2-[4,7,10 tris(carboxymethyl)-1,4,7,10-tetraazacyclo dodec-1-yl]acetyl]amino]ethyl]thio]methyl]phenyl]methyl]-N-(1-oxohexyl)-L-cysteinyl-L-prolylL-prolyl-L-threonyl-L-glutaminyl-L-phenylalanyl-, cyclic (1→7)-thioether
![Picture of BQ-123 [Cyclo(D-Trp-D-Asp-Pro-D-Val-Leu)]](https://bc3c83a0874864a50753-7010fd7f2bdf81ab41ee28479491701e.ssl.cf2.rackcdn.com/media//catalog/AR-P01448.jpg?size=256 "Show details for BQ-123 [Cyclo(D-Trp-D-Asp-Pro-D-Val-Leu)]")
