1425512 Hexapeptide AYERST MCKENNA & HARRISON Ltd 14 Feb 1973 [15 Feb 1972 12 April 1972] 32176/75 Divided out of 1425511 Heading C3H The novel hexapeptide trifluoroacetate HPyr - His - Trp - Ser - Tyr - Gly - NHNH 2 . CF 3 COOH is prepared by conventional methods of peptide chemistry.
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