Reinvestigation of the reductive rearrangement of 1,4-bis(2-chloro-2-p
ropenyl)-9,10-anthraquinone with high quality sodium dithionite has gi
ven new products. We report here the structure of one of these compoun
ds, 1-dihydroxy-2-methylanthra[1,2-b]furan-6(11H)-one, C20H15ClO4.