Patent ID: 7074777

Claim:
A vitamin D derivative of Formula (1): wherein in Formula (1), X is oxygen or sulfur; R 1 is Formula (2) wherein in Formula (2), A is â€”COâ€”, â€”CR 9 R 10 â€” in which R 9 and R 10 are hydrogen or hydroxy, â€”CR 11 â•CR 12 â€” in which R 11 and R 12 are hydrogen or alkyl or â€”Câ‰¡Câ€”; R 7 and R 8 are hydrogen or hydroxy which may have a protecting group; m is 1 to 2; and n is a number from 0 to 2; R 2 is the same at both positions and is hydrogen or alkyl; R 3 and R 4 are hydrogen or alkyl or R 3 and R 4 together form a double bond between the 16- and 17-positions; R 5 is hydrogen or â€”OR 13 in which R 13 is hydrogen or a protecting group; and R 6 is hydrogen or a protecting group.