2525.13 Ibuprofen [15687-27-1] 9467.14 Diclofenac [15307-86-5] 9818.14 1-(2,6-Dichlorophenyl)indolin-2-one (Diclofenac artifact) [15362-40-0] 3623.20 17alpha-Ethynylestradiol [57-63-6] 8998.18 17beta-Estradiol [50-28-2]