(2R,4R,5Z)-4-CARBOXY-5-(2-HYDROXYETHYLIDENE)-3-(((2R,3Z,5R)-3-(2-HYDROXYETHYLIDENE)-7-OXO-4-OXA-1-AZABICYCLO(3.2.0)HEPT-2-YL)CARBONYL)-2-OXAZOLIDINEACETIC ACID
(2r,4r,5z)-4-carboxy-5-(2-hydroxyethylidene)-3-(((2r,3z,5r)-3-(2-hydroxyethylidene)-7-oxo-4-oxa-1-azabicyclo(3.2.0)hept-2-yl)carbonyl)-2-oxazolidineacetic acid