(D-Pen(2)-pcl-phe(4)-D-pen(5))enkephalin (D-Pen2,5, pCl-Phe4)enkephalin 122507-47-5 2,5-Pen-4-(4-chloro-phe)-enkephalin 2,5-Penicillamine-4-(4-chlorophenylalanine)-enkephalin D-Valine, L-tyrosyl-3-mercapto-D-valylglycyl-4-chloro-L-phenylalanyl-3-mercapto-, cyclic (2-5)-disulfide Dpdp(Cl)E Enkephalin, D-pen(2), D-pen(5), p-Cl-phe(4) Enkephalin, pen(2,5)-4-chloro-phe(4)- Enkephalin, penicillamine(2,5)-4-chlorophenylalanine(4)- Pcl-dpdpe