The chemical CTOP has a designated molecular formula of C50H67N11O11S2 and a molecular weight of 1062.272 g/mol. Synonyms may include: Phenylalanyl-cyclo(cysteinyltyrosyl-tryptophyl-ornithyl-threonyl-penicillamine)threoninamide, CTOPA, Ctop-NH2, Cys(2)-tyr(3)-orn(5)-pen(7)-amide, Phe-cycl(cys-tyr-trp-orn-thr-pen)thr-NH2 (ChemID).