Compositions and methods for treating mammalian diseases or conditions characterized by undesirable angiogenesis by administering an effective amount of a compound of the formulae: [chemical expression included] wherein Ra is selected from —OCH3, —OCH2CH3 or —CCCH3; and Z is selected from >C(H)—OH, >C(H)—O-alkyl, >C(H)—O-sulfamate, where alkyl is a linear, branched and/or cyclic hydrocarbon chain comprising 1 to 10 carbons.