1-Azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid,3-[[(1Z)-2-[4-[(dimethylamino)carbonyl]-5-thiazolyl]ethenyl]thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-, monosodium salt, (4R,5S,6S)- [ 912638-22-3 ]