A compound represented by the general formula (C):(wherein R101 represents a substituted or unsubstituted aromatic heterocyclic group,R102, R103, R104 and R105 may be the same or different, and each represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 3 carbon atoms, or a haloalkyl group having 1 to 3 carbon atoms, andR106 represents a hydrogen atom, or a saturated or unsaturated hydrocarbon group which is a straight or branched chain having 1 to 12 carbon atoms, butexcluded is the case where R101 is a 3-furyl group, R102, R103, R104 and R105 are all methyl groups, and R106 is a methyl group, a 4-methyl-3-pentenyl group or a 4,8-dimethyl-3,7-nonadienyl group) ora pharmaceutically acceptable salt thereof has selective inhibitory activity on hypoxic cell growth in a broad range of the concentration and therefore is useful as an active ingredient of a medicament for cancer prevention or treatment.
