| 摘要 |
PROBLEM TO BE SOLVED: To provide a compound having an antitumor activity and a neovascularization inhibitory activity. SOLUTION: The compound is represented by general formula (I) (wherein, R<SP>1</SP>denotes a≥3C straight chain, a≥3C branched chain or a≥3C cycloalkyl group or an aromatic group; R<SP>2</SP>denotes a hydrogen atom, a straight chain, a branched chain or a cycloalkyl group, a straight chain, a branched chain or a cyclic acyl group or a protecting group of the hydroxy group; R<SP>3</SP>denotes a hydrogen atom, a straight chain, a branched chain or a cycloalkyl group, a straight chain, a branched chain or a cyclic acyl group or a protecting group of the hydroxy group; R<SP>4</SP>denotes a hydrogen atom, a straight chain, a branched chain or a cycloalkyl group; or an OR<SP>3</SP>and the R<SP>4</SP>together may denote an oxo group or an oxime group) or its optically active substance or a pharmaceutically acceptable salt thereof or a hydrate or a solvate thereof. COPYRIGHT: (C)2005,JPO&NCIPI
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