6-Monoacetylmorphine/Creatinine:MRto:Pt:Urine:Qn
6-monoacetylmorphine/creatinine:mrto:pt:urine:qn
6-Monoacetylmorphine (6-MAM)/Creatinine (U) [Mass ratio]
6-monoacetylmorphine (6-mam)/creatinine (u) [mass ratio]