0 Aztreonam(¦Â-form) CAS 78110-38-0 In APIs, Pharmaceutical Chemicals, Products 78110-38-0,Aztreonam(¦Â-form),[2S-[2a,3b(Z)]]-2-[[[1-(2-Amino-4-thiazolyl)-2-[(2-methyl-4-oxo-1-sulfo-3-azetidinyl)amino]-2-oxoethylidene]amino]oxy]-2-methylpropanoic acid