2',6'-dimethyltyrosyl--1,2,3,4-tetrahydro-3-isoquinolinecarbonyl-psi(CH2MH)-phenylalanyl-phenylalaninamide
2',6'-dimethyltyrosyl--1,2,3,4-tetrahydro-3-isoquinolinecarbonyl-psi(ch2mh)-phenylalanyl-phenylalaninamide