Synonyms: 1,2-Dithia-5,8,11-triazacyclotetradecane,cyclic peptide deriv.; 159: PN: US20030176421 PAGE: 54-55 claimed protein; 48:PN: US20050009742 PAGE: 19 claimed sequence; Cyclic [D-Pen2,D-Pen5]enkephalin;Cyclic(D-penicillamine2,5)enkephalin;[2-D-Penicillamine,5-D-penicillamine]enkephalin; [D-Pen2,5]Enkephalin; [D-Pen2,D-Pen5]enkephalin