4-Ser-deaminotocinamide 53348-55-3 Deaminotocinamide, ser(4)- Deaminotocinamide, serine(4)- N-(3-Mercapto-1-oxopropyl)-L-tyrosyl-L-isoleucyl- L-seryl-L-asparaginyl-L-cysteinamide, cyclic (1-5)- disulfide