enkephalin, Pen(2,5)-4-iodo-Phe(4)- is a chemical compound registered under CAS number 135108-10-0, with the molecular formula C30H38 I N5 O7 S2 and a molecular weight of about 771.68 g/mol. It is also known as 1,2-Dithia-5,8,11-triazacyclotetradecane,cyclic peptide deriv. GoooChem supplies enkephalin, Pen(2,5)-4-iodo-Phe(4)- for laboratory research and bulk production; product code 1096405. Send an inquiry for purity, packaging, price and lead time.