Saan 1937, p-fenyleniamine min ka ca ni bɛɛ ye, o dilanna, o min tun be weele ko "4000 seri kɔrɔ min be se ka mɔgɔ kɔrɔbaya", 4010, 4010NA, 4020, {{8} .
4010NA: A be weele fana ko IPPPD, N-izopropili-N, fenili-p-fenilɛniyemiyamini.
4010: A be weele fana ko CPPD CPPD, N-sikloɛkisili-N-fenili-p-fenili-fenilɛni.
4020: A be weele fana ko 6PPD, N-(1,{4}}dimetili)butili-N-den-p-fenili-fenilɛni.
4030: A be weele fana ko 7PPD, N, N’-bis(1, {4}dimitilipentilili)-p-fenilɛni.