2,2'-(Dithiobis(methylene))bisfuran 2,2'-(Dithiodimethylene)difuran 2-Furfuryl disulfide 4437-20-1 Bis(2-furfuryl) disulfide DIFURFURYL DISULFIDE EINECS 224-649-6 FEMA No. 3146 Furan, 2,2'-(dithiobis(methylene))bis- Furan, 2,2'-(dithiodimethylene)di- Furfuryl disulfide