the conformationally restricted enkephalin analogues [ 2-d-penicillamine , 5-l-cysteine ] enkephalin ( dplce ) , [ 2-d-penicillamine , 5-l-penicillamine ] enkephalin ( dplpe ) and [ 2-d-penicillamine , 5-d-penicillamine ] enkephalin ( dpdpe ) produced dose-related inhibition of reflex bladder contractions when administered by the i.c.v . or i.t . route .
C0014298
enkephalin
C0525856
dpdpe