Alachlor ESA sodium salt, 25mg

N-(4-chloro[13C6]phenyl)-N'-(3,4-dichloro[13C6]phenyl)[13C]urea , 1.2ml x 50ug/ml, methanol

Metribuzin-desamino, 5mg

3,3-Dichlorobiphenyl (BZ-11)