4-Ethylmethcathinone:MCnc:Pt:Urine:Qn:Confirm
4-ethylmethcathinone:mcnc:pt:urine:qn:confirm
4-Ethylmethcathinone [Mass/volume] in Urine by Confirmatory method
4-ethylmethcathinone [mass/volume] in urine by confirmatory method