2H-Cyclopenta[b]furan-2-one, 4-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]hexahydro-5-[(tetrahydro-2H-pyran-2-yl)oxy]-, (3aR,4S,5R,6aS)-

(3ar,4s,5r,6as)-(-)-(tert-butyldimethylsilyloxymethyl)hexahydro-5- (tetrahydro-2h-pyran-2-yloxy)-2h- ; 4-(t-butyldi-me-sio-me)hexa-h-5-(t-h-pyran -2-ylo ; 2h-cyclopenta[b]furan-2-one,4-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]hexahydro-5-[(tetrahydro-2h-pyran-2-yl)oxy]-,(3ar,4s,5r,6as)- ; (3ar,4s,5r,6as)-(-)-(tert-butyldimethylsilyloxymethyl)hexahydro-5-(tetrahydro-2h-pyran-2-yloxy)-2h-cyclopenta[b]furan-2-one ; (3ar,4s,5r,6as)-4-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]hexahydro-5-[(tetrahydro-2h-pyran-2-yl)oxy]-2h-cyclopenta[b]furan-2-one ; 2h-cyclopenta[b]furan-2-one,4-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]hexahydro-5-[(tetrahydro-2h-pyran-2-yl)oxy]-,[3ar-(3aa,4a,5b,6aa)]- ; 4-(t-butyldi-me-sio-me)hexa-h-5-(t-h-pyr -2-yloxy)-cyclopenta(b)furan-2-on, 97 ; (3ar,4s,5r,6as)-(?-(tert-butyldimethylsilyloxymethyl)hexahydro-5-(tetrahydro-2h-pyran-2-yloxy)-2h-cyclopenta[b]furan-2-one ; (3ar,4s,5r,6as)-4-(((tert-butyldimethylsilyl)oxy)methyl)-5-((tetrahydro-2h-pyran-2-yl)oxy)hexahyd ; (3ar,4s,5r,6as)-4-((tert-butyldimethylsilyloxy)methyl)-5-(tetrahydro-2h-pyran-2-yloxy)hexahydro-2h-cyclopenta[b]furan-2-one ; 4-(t-butyldi-me-sio-me)hexa-h-5-(t-h-pyr an -2-yloxy)-cyclopenta(b)furan-2-on, 97 ; (3ar,4s,5r,6as)-4-(tert-butyldimethylsilyloxy)methyl-5-tetrahydropyranyloxy-hexahydro-2h-cyclopenta[b]furan-2-one