D8-Naphthalene, 10.0 µg/ml, Cyclohexane, 10ml

2,2',4,4'-Tetrabromo-6-methoxy[13C12]diphenyl ether, 1.2ml x 50ug/ml, nonane

Meropenem-d6 (>90%), 1mg

2-Methoxyethyl acetate