The molecule is zwitterionic form of L-lupinic acid having an anionic carboxy group and a protonated nitrogen. It is a conjugate acid of a L-lupinate. It is a tautomer of a L-lupinic acid.
(2S)-2-azaniumyl-3-[6-[[(E)-4-hydroxy-3-methylbut-2-enyl]amino]purin-9-yl]propanoate