The invention provides compounds of the formula: ##STR00001## wherein (a) is a single or double bond; W is CH, CH.sub.2, CHCH.sub.3, C(CH.sub.3).sub.2, C(CH.sub.2).sub.2 or C(CH.sub.2).sub.3; X is N; and Y is H or F, and salts, hydrates, tautomers, pure enantiomers, and enantiomeric mixtures; and a method of treating schizophrenia comprising administering same.