Novel synthetic derivatives of vitamin D compounds are disclosed as well as processes for their synthesis. The novel compounds are 1-alpha-thio and acylated, 1-beta-thio derivatives of vitamin D compounds and the glycosylated, hydroxylated, fluorinated, and glycosylated orthoester analogues thereof....http://www.google.com.au/patents/US4661294?utm_source=gb-gplus-sharePatent US4661294 - Biologically active 1-thio derivatives of vitamin D
