3VHW:
reference: Synthesis of novel C-2 substituted vitamin D derivatives having ringed side chains and their biological evaluation on bone., Saito H, Takagi K, Horie K, Kakuda S, Takimoto-Kamimura M, Ochiai E, Chida T, Harada Y, Takenouchi K, Kittaka A, J Steroid Biochem Mol Biol. 2013 Feb 13. pii: S0960-0760(13)00025-3. doi:, 10.1016/j.jsbmb.2013.02.004. PMID: 23416104

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