The molecule is conjugate base of isonocardicin A zwitterion where both carboxy groups are deprotonated while the homoserine amino group is protonated. It is a conjugate base of an isonocardicin A zwitterion. It is a conjugate acid of an isonocardicin A(2-).
(2S)-2-azaniumyl-4-[4-[(Z)-C-[[(3S)-1-[(R)-carboxylato-(4-hydroxyphenyl)methyl]-2-oxoazetidin-3-yl]carbamoyl]-N-hydroxycarbonimidoyl]phenoxy]butanoate