This invention relates to Benzopyranone Compounds, compositions comprising a Benzopyranone Compound and methods for treating or preventing cancer or inhibiting the growth of a cancer cell or neoplastic cell comprising administering an effective amount of a Benzopyranone Compound. The Benzopyranone Compounds have the formula: ##STR00001## or a pharmaceutically acceptable salt thereof, wherein R.sub.1 is halogen, trifluoromethyl or C.sub.1-6 alkyl.