the level of cyclic amp in ncb-20 cells was increased by serotonin ( 5-ht ) , 5-methoxytryptamine and 2-methyl-5-ht with ec50 of 0.5 +/- 0.1 , 1.0 +/- 0.1 , 10 +/- 0.1 microm , respectively .
C0036751
5-ht
C0000589
5-methoxytryptamine