2-Piperidinecarboxylic acid, 1-(N-(5-oxo-L-prolyl)-L-histidyl)-, methyl ester 64783-97-7 L-Pyroglutamyl-L-histidyl-L-pipecolic acid methyl ester Methyl pyroglutamyl-histidyl-pipecolate Pglu-his-pip-ome