+/0 0.05; 5, 7.35 +/- 0.06; 6, 7.57 +/- 0.06; 7, 7.32 +/- 0.10; 8, 7.29 +/- 0.07. They are also highly effective antagonists of the vasopressor responses to AVP, with antivasopressor pA2 values in the range of 7.86 to 8.44. These findings indicate tht in this series O-ethyl substitution on the tyrosine at position 2 is optimal for antiantidiuretic potency and that L-arginine is far superior to D-arginine
[1-(β-巯基-β,β-环五亚甲基
丙酸),4-缬
氨酸,8-
D-精氨酸]
加压素[d-(
CH2)5 V
DAVP]的四个类似物及其
L-精氨酸异构体d(的四个类似物通过固相方法,使用略微修饰的重氧化步骤,然后在液态
氨中的
钠解封以克服损失,通过固相方法制备 )5 VAVP,在位置2上具有O-甲基,O-乙基,O-异丙基和On-丙基
酪氨酸取代基由于不溶性。这些类似物如下:1,d( )5Tyr(Me)V
DAVP; 2,d( )5Tyr(Et)V
DAVP; 3,d( )5Tyr(i-Pr)V
DAVP; 4,d( )5Tyr(n-Pr)V
DAVP; 5,d( )5Tyr(Me)VAVP; 6,d( )5Tyr(Et)VAVP; 7,d( )5Tyr(i-Pr)VAVP; 8,d(CH 2)5 Tyr(n-Pr)VAVP。在大鼠抗利尿剂和大鼠血管加压药分析系统中测试了这些类似物