(6R,7R)-7-[[(2R)-2-Amino-2-(4-hydroxyphenyl)acetyl]amino]-8-oxo-3-[(1H-1,2,3-triazol-5-ylthio)methyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid-d4; (6R,7R)-7-[[(2R)-Amino(4-hydroxyphenyl)acetyl]amino]-8-oxo-3-[(1H-1,2,3-triazol-4-ylthio)methyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid-d4; [6R-[6α,7β(R*)]]-7-[[Amino(4-hydroxyphenyl)acetyl]amino]-8-oxo-3-[(1H-1,2,3-triazol-4-ylthio)methyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid-d4; 1H-1,2,3-Triazole, 5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid Deriv.-d4; 7-[D-α-Amino-α-(4-hydroxyphenyl)acetamido]-3-(1,2,3-triazol-5-ylthiomethyl)-3-cephem-4-carboxylic Acid-d4; Antibiotic BL-S 640-d4; BL-S 640-d4; Cefaperos-d4; Cephatrizin-d4; Cephatrizine-d4; Cepticol-d4; S 640P-d4; SKF 60771-d4