(4S,5R)-2-Iodo-4,5-bis-methoxymethoxy-cyclopent-2-enone

(3S,6S,7R)-4-Iodo-6,7-bis-methoxymethoxy-1-oxa-spiro[2.4]hept-4-ene

(1R,4S,5R)-1-Hydroxymethyl-2-iodo-4,5-bis-methoxymethoxy-cyclopent-2-enol

Acetic acid (1R,2R,5S)-2-acetoxymethyl-2,5-dihydroxy-3-iodo-cyclopent-3-enyl ester

Acetic acid (1R,4S,5R)-1-acetoxymethyl-2-iodo-4,5-bis-methoxymethoxy-cyclopent-2-enyl ester