nitrofuran,methylidene,pyrazine,carbohydrazide,furan
Furan
66964-61-2(3R)-3aα,4,4aβ,5,6,7,8,8a,9,9aα-Decahydro-3α,8aα-dimethyl-5-methylenenaphtho[2,3-b]furan-2(3H)-one 23640-01-94,7-Epoxycyclobut[f]isobenzofuran-5,6-dicarboxylicacid, 1,3,3a,4,4a,6a,7,7a-octahydro-1,3-dioxo-