... dye intermediate. malononitrile Cyanoacetamide1,5-Naphthalene disulfonic acid1,5-Naphthalene disulfonic acid disodium salt2,7-Naphthalene disulfonic acid disodium salt2,7-Dihydroxy naphthalene1,6 ... ,6-Dimethoxy naphthalene1,6-Naphthalene disulfonic acid disodium salt2,6-Naphthalene disulfonic acid disodium salt1,5-Dihydroxy naphthalene2,7-Dimethoxy naphthaleneEthyl 2,3 ...