(5R,8S,9R)-6-Iodo-8,9-bis-methoxymethoxy-1,3-dioxa-spiro[4.4]non-6-en-2-one

methyl 4,6-O-(4-methoxybenzylidene)-α-D-glucopyranoside

(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