1,2:5,6-Di-O-isopropylidene-alpha-D-ribo-hexofuranose-3-ulose (mixture of keto and ketal forms)

1,2:5,6-di-o-isopropylidene-a-d-ribo-3-h exofuranos ; 1,2:5,6-di-o-isopropylidene-a-d-ribo-hexofuranose-3-ulose ; 1,2:5,6-di-o-isopropylidene-α-d-ribohexofuran-3-ulose ; 1,2:5 ; alpha-d-ribo-hexofuranos-3-ulose,1,2:5,6-bis-o-(1-methylethylidene)- ; 1,2:5,6-di-o-isopropylidene-alpha-d-ribo-3-hexulofuranose ; 1,2:5,6-bis-o-isopropylidene-alpha-d-ribo-hexofuranos-3-ulose ; 1,2:5,6-di-o-isopropylidene-a-d-ribo-3-hexulofuranose ; 1,2:5,6-di-o-isopropylidene-α-d-ribo-3-hexofuranosulose ; 5-(2,2-dimethyl-1,3-dioxolan-4-yl)-2,2-dimethyl-3a,6a-dihydrofuro[2, ; 1,2:5,6-di-o-isopropylidene-α-d-ribohexofuranos-3-ulose ; furo[2,3-d]-1,3-dioxole,alpha-d-ribo-hexofuranos-3-ulosederiv. ; d-ribo-hexofuranos-3-ulose, 1,2:5,6-di-o-isopropylidene-,alpha- (8ci) ; d-ribo-hexofuranos-3-ulose,1,2:5,6-di-o-isopropylidene- (7ci) ; 1,2:5,6-di-o-isopropylidene-alpha-d-ribohexofuran-3-ulose ; 1,2:5,6-di-o-isopropylidene-α-d-ribo-3-furanosulose