Patent ID: 7297682

Claim:
A liquid crystal polymorph of (2R,3S,4R,5R,8R,10R,11R,12S,13S,14R)-13-[[2,6-dideoxy-3-C-methyl-3-0-methyl-4-C-[(propylamino)methyl]-α-L-ribo-hexopyranosyl]oxy]-2-ethyl-3,4,10-trihydroxy-3,5,8,10,12,14-hexamethyl-11-[[3,4,6-trideoxy-3-(dimethylamino)-β-D-xylo-hexopyranosyl]oxy]-1-oxa-6-azacyclopentadecan-15-one diphosphate having the formula wherein n is 0 to 8; said liquid crystal having a lath-like habit and exhibiting longitudinal cleavage; and having about 48% C, about 9% H, about 4% N, about 6% P, and about 5 to 6% water; and wherein said liquid crystal gains about 15% by weight with a subsequent loss of birefringence at about 87% relative humidity.