“…,lithium carbonate , cesium chloride and intraventricularly administered dibutyryl cyclic AMP, as … reported to increase the rate of biosynthesis of 5-hydroxytryptamine (5-HT) in mammalian brain tissue (TOZER, NEFF and BRODIE, 1966; REID et a[., …, 1970; TAGLIAMONTE et al., 1971~; PEREZ-CRUET and EICHELMAN, 1972; TAGLIMONTE et al., 1972).”