(D-Pen(2),D-pen(5))enkephalin 2,5-Pen-enkephalin 88381-29-7 Bis-pen-enkephalin Bis-penicillamine-enkephalin D-Valine, 3-mercapto-N-(N-(N-(3-mercapto-N-L-tyrosyl-D-valyl)glycyl)-L-phenylalanyl)- D-Valine, L-tyrosyl-3-mercapto-D-valylglycyl-L-phenylalanyl-3-mercapto-, cyclic (2-5)-disulfide DPDPE DPLPE Dpdpe(SH)2 Enkephalin, pen(2,5)- Enkephalin, penicillamine(2,5)- LY 198572 Pen(2),pen(5)-enkephalin