Crystal structure of BRL 42715, C6-(N1-methyl-1,2,3-triazolylmethylene)penem, in complex with Enterobacter cloacae 908R beta-lactamase: evidence for a stereoselective mechanism from docking studies.
Michaux C, Charlier P, Frere JM, Wouters J, J Am Chem Soc, 2005 Mar 16 - link