1,4-Benzenediamine, 2,5-dimethoxy-N,N-dimethyl- 2,5-Dimethoxy-N,N-dimethylbenzene-1,4-diamine 72066-78-5 EINECS 276-317-5 N,N-Dimethyl-2,5-dimethoxy-1,4-benzenediamine Tetrahydropyran oxyeugenol