| abstract |
A synthetic compound which is biologically active in maintaining calcium and phosphorous metabolism in animals, of the formula (I), wherein the double bond between positions C-22 and C-23 is single or double, R2 is hydrogen, CH3 or CH2CH3; X is selected from the the group consisting of hydrogen and -OR1, where R1 is hydrogen or a straight or branched chain glycosidic residue containing 1-20 glycosidic units per residue; with the proviso that at least one of the R1 is a glycosidic residue. |