Isopropylphenylpphenylenediamine

(4-aminophenyl)-isopropyl-phenyl-amine

n-(1-methylethyl)-n-phenyl-4-benzenediamine

N1-phenyl-N1-propan-2-yl-benzene-1,4-diamine

1-N-phenyl-1-N-propan-2-ylbenzene-1,4-diamine