| abstract |
(57) Summary [Objective] To provide a new class of vitamin D compounds, particularly vitamin D 2 compounds and related compounds, which are suitably obtained from readily available or available starting materials. [Structure] General formula: [Wherein R 1 is a hydrogen atom or a hydroxy protecting group, and Z is represented by the general formula: And A and B are each independently a hydrogen atom or a methyl group, or A and B together form a methylene group]. |