37714-57-1 6,7-Dimethoxy-2,3-dimethyl-4-(2-nitroethenyl)benzofuran Benzofuran, 6,7-dimethoxy-2,3-dimethyl-4-(2-nitroethenyl)- Dimethyl-2,3 (nitro-2 vinyl)-4 dimethoxy-6,7 benzofuranne [French] R 5209