Cyclopentane

2,2',3,3',4,4',5,6,6'-Nonabromo[13C12]diphenyl ether, 1.2ml x 50ug/ml, toluene

2,2’,4,5,5’-Pentachlorobiphenyl (101)

1,2,4,8-Tetrachlorodibenzofuran, 1.2ml x 50ug/ml, nonane