19-nor-vitamin D analogs having an additional heterocyclic ring connecting the 3β-oxygen and carbon-2 or the 1α-oxygen and carbon-2 of the A-ring of the analog, and pharmaceutical uses therefore, are described. These compounds exhibit significant activity in mobilization of bone, making them therapeutic agents for the treatment or prophylaxis of osteoporosis, osteomalacia, osteopenia, renal osteodystrophy and hypoparathyroidism.
描述了具有额外杂环连接模拟物A环的3β-氧和碳-2或1α-氧和碳-2的19-去氢
维生素D类似物,以及其药用途。这些化合物在骨骼的活动性中表现出显著活性,使它们成为治疗或预防骨质疏松症、骨软化症、骨质疏松、肾性骨病和甲状旁腺功能减退症的治疗药物。