esters. In the preparation of C6 ethers, C4 and C4,6 bisethers were also isolated; their relative activity is: C6 > C4 > C4,6. These C6 long-chain derivatives are subnanomolar squalene synthase inhibitors; they are, however, only weakly active in inhibiting hepatic cholesterol synthesis in mice. The C6 short-chain derivatives are much less active in vitro, but they all have improved oral activity in
系统地修改了一种有效的
角鲨烯合酶
抑制剂zaragozic A的C6酰基侧链,以改善其
生物学活性。将C6侧链简化为
辛酸酯具有有害作用。增加线性链长度可提高体外活性,直至
十四烷酸酯为止。ω-苯氧基比ω-苯基更好的活性增强剂。制备了许多C6
氨基甲酸酯,醚和
碳酸酯,发现它们具有与C6酯相似的活性。在制备C6醚时,还分离出C4和C4,6双醚。它们的相对活性为:C6> C4> C4,6。这些C6长链衍
生物是亚纳摩尔
角鲨烯合酶
抑制剂。然而,它们仅在抑制小鼠肝
胆固醇合成中具有弱活性。C6短链衍
生物在体外的活性低得多,但它们在小鼠中的口服活性均得到改善。正丁酰基类似物的C1烷基侧链(ED50为4.5 mg / kg)的修饰不能进一步提高po活性。这些C6长链衍
生物中的许多也是体外有效的抗真菌剂。