1406-07-1 Calcium 3,3-dimethyl-7-oxo-6-(2-phenylacetamido)-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylate Calcium pencillin EINECS 215-795-1 Penicillin Calcium [USAN] Penicillin calcium Penicillin, calcium salt