115091-89-9 2,9-Dimethoxy-4-(4-methoxyphenyl)-5H-(1)benzothiopyrano(4,3-b)pyridine-3-carbonitrile 5H(1)-Benzothiopyrano(4,3-b)pyridine-3-carbonitrile, 2,9-dimethoxy-4-(4-methoxyphenyl)- BRN 4274415