potassium (2S-trans)-3-[[[2-(formylamino)thiazol-4-yl]acetyl]amino]-2-methyl-4-oxoazetidine-1-sulphonate

(2S)-3α-[[[2-(Formylamino)-4-thiazolyl]acetyl]amino]-2β-methyl-4-oxo-1-azetidinesulfonic acid potassium salt