BUA report / Supplementary reports, 15, N,N'-Diphenylguanidine (No. 96), N-Phenyl-1-naphthylamine (No. 113), 2,2'-Dithio-bis-benzothiazole (No. 126), N-Isopropyl-N'-phenyl-1,4-phenylene diamine (IPPD) (No. 207), N-(1,3-Dimethylbutyl)-N'-phenyl-1,4-phenylene diamine (6PPD) (No. 208)