US 6,982,257 B1 | ||
Vitamin D3 derivative and its production method | ||
Hiroaki Takayama, Kanagawa (Japan); Katsuhiro Konno, Kanagawa (Japan); and Toshie Fujishima, Kanagawa (Japan) | ||
Assigned to Teijin Limited, Osaka (Japan) | ||
Appl. No. 9/214,155 PCT Filed Apr. 30, 1998, PCT No. PCT/JP98/01979 § 371(c)(1), (2), (4) Date Dec. 29, 1998, PCT Pub. No. WO98/50353, PCT Pub. Date Nov. 12, 1998. |
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Claims priority of application No. 9-114695 (JP), filed on May 02, 1997. | ||
Int. Cl. A61K 31/59 (2006.01); C07C 401/00 (2006.01) |
U.S. Cl. 514—167 | 2 Claims |
1. A 1,25-dihydroxy-2-methylvitamin D3 compound, wherein the compound is
(i) (20S)-1α,25-dihydroxy-2β-methyl-3β-vitamin D3;
(ii) (20S)-1β,25-dihydroxy-2β-methyl-3α-vitamin D3;
(iii) (20S)-1α,25-dihydroxy-2α-methyl-3β-vitamin D3; or
(iv) (20S)-1α,25-dihydroxy-2α-methyl-3α-vitamin D3.
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