"sodium pyroglutamate" . "5-Oxoproline" . . . . . . . . . . . . . . "Pyrrolidone carboxylic acid" . . . "Pyroglutamic acid" . . "5-oxoprolinemia" . . "5-Oxopyrrolidine-2-carboxylic acid" . "Pyroglutamic acid" . "5-oxoproline" . "pyroglutamate" . . . . "pyroglutamic" . . "pyroGlu" . . "pyroglutamic acid" .