Synonyms: 6-(2,6-Dimethoxybenzamido)penicillanic acid;Penicillin, (2,6-dimethoxyphenyl)-;[2S-(2a,5a,6b)]-6-[(2,6-Dimethoxybenzoyl)amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic Acid;Methicillinum;Meticilline;(2,6-Dimethoxyphenyl)penicillin;