Verapamil hydrochloride, 100mg

1,2,4,7,8-Pentabromodibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

Bifenox, 100µg/ml in MeOH, 1ml

2,4,4'-Trichloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane