The molecule is an alpha-amino-acid cation obtained by deprotonation of the carboxy group and protonation of the amino groups of (4-{4-[2-(gamma-L-glutamylamino)ethyl]phenoxymethyl}furan-2-yl)methanamine: major species at pH 7.3.
(2S)-2-azaniumyl-5-[2-[4-[[5-(azaniumylmethyl)furan-3-yl]methoxy]phenyl]ethylamino]-5-oxopentanoate