NCIt definition : A semisynthetic oxa-beta-lactam antibiotic, with antibacterial activity used mainly
against gram-negative aerobic bacteria. Replacing the beta-lactam sulfur atom for
an oxygen atom and the presence of the methyltetrazolethio moiety and the para-hydroxyphenylmalonyl
group, increases the antibacterial activity of moxalactam. The 7-alpha-methoxy group
and the para-hydroxyphenylmalonyl group increases the stability of this agent against
beta-lactamases. The use of this agent has been associated with fatal bleeding events.;