. . . . "Agent: Lucas & Mercanti, LLP20090227527 - Pharmaceutical composition for preventing and/or treating bone disease, functional food or health food and pharmaceutical preparation comprising thereof as active ingredient: (In the formula (I), R1 and R5 are a functional group selected from the group consisting of a hydrogen atom, alkyl group having carbon numbers 1 to 3, monosaccharide and disaccharide;" .