(+)-(3R,4S,5R)-3-mesyloxy-5-methyl-4-p-nitrobenzoyloxy-dihydro-2(3H)-furanone

(-)-(3S,4S,5R)-3,4-epoxy-5-methyldihydro-2(3H)-furanone

4-Nitro-benzoic acid (2R,3R,4R,5R)-4-hydroxy-5-methoxy-2-methyl-tetrahydro-furan-3-yl ester

(5R)-3-mesyloxy-5-methyl-2(3H)-furanone

(1R,4R,5R)-4-Methyl-3,6-dioxa-bicyclo[3.1.0]hexan-2-ol