IT H CHs CHa 27 S 0.1 1/2 I11 HH CH (CH3) z 57 B 1.0 1/20 11'R" HH 2 y B 5.0 1/100 Vr" CHa CHB 27 B 1.2 1/25 a R= benzyl. Isolated rat uterus response, S= stimulation, B= block of serotonin stimulation. Values in column are concentration mg./l. Serotonin (5- hydroxytryptamine creatinine sulfate) is active at 0.2-0.4 y. The stimulating action of I on isolated rat uterus is blocked by a I: 20,000,000 dilution of lysergic acid diethylamide ...
