(20S)-1alpha-HYDROXY-2alpha-METHYL AND 2beta-METHYL-19-NOR-VITAMIN D3 AND THEIR USES

The invention publicly (20S)-1 α-hydroxy-2-methyl-Vitamin D3 and alpha-methyl -19-(20S)-1 α-hydroxy-2-methyl -19-β-methyl-Vitamin D3 and its pharmaceutical uses. These compounds inhibit proliferation of undifferentiated cells and induced differentiation of mononuclear cells display a distinct activity, thus demonstrating their use as anticancer drugs, and treatment of skin diseases such as psoriasis, and skin conditions such as wrinkles, sagging skin, dry skin and lack of sebum secretion. These compounds also have very significant activity of calcium, so it can be used in the treatment of human immune diseases such as osteoporosis and metabolic bone disease.