(Z)-alpha-((5-Nitro-2-furanyl)methylene)-2-furanacetic acid 2-FURANACETIC ACID, alpha-((5-NITRO-2-FURANYL)METHYLENE)-, (Z)- 27795-51-3 cis-3-(5-Nitro-2-furyl)-2-(2-furyl)acrylic acid