The present invention provides compounds of formula (I) ##STR00001## the stereoisomers and prodrugs thereof, and the pharmaceutically acceptable salts of the compounds, stereoisomers, and prodrugs, wherein R.sup.1, R.sup.2 and R.sup.3 are as defined herein; pharmaceutical formulations thereof; and use thereof in the treatment of, inter alia, conditions, diseases, and symptoms such as bipolar disorder, diabetes, dementia, Alzheimer's Disease, stroke, schizophrenia, depression, hair loss, and cancer.