1,4,7,10-Tetraazacyclododecane-2,5,8,11-tetrone, 3-butyl-1,6,7-trimethyl-12-(phenylmethylene)-, (3S-(3R*,6R*,12E))- 54987-63-2 Cyclo(N-methyl-ala-leu-N-methyl-phe-gly) Cyclo(N-methyl-alanyl-leucyl-N-methyl-phenylalanyl-glycyl) Dihydrotentoxin