Abstract: An amino alcohol derivative useful as an excellent immunosuppressive agent is provided. As a result of intensive research to create a highly safe compound which has an excellent immunosuppressive activity, it was discovered that an amino alcohol derivative represented by the general formula (1), has excellent immunosuppressive activity.

Abstract: To provide an amino phosphate derivative having an excellent sphingosine-1-phosphate (S1P) receptor modulatory action. As a result of continued intensive research to create a highly safe compound which has an S1P receptor modulatory action, is has been discovered that an amino phosphate derivative represented by the following general formula (1), has a strong S1P receptor modulatory action.

Abstract: An amino alcohol derivative useful as an excellent immunosuppressive agent is provided. As a result of intensive research to create a highly safe compound which has an excellent immunosuppressive activity, it was discovered that an amino alcohol derivative represented by the general formula (1), has excellent immunosuppressive activity.

Abstract: To provide an amino phosphate derivative having an excellent sphingosine-1-phosphate (S1P) receptor modulatory action. As a result of continued intensive research to create a highly safe compound which has an S1P receptor modulatory action, is has been discovered that an amino phosphate derivative represented by the following general formula (1), has a strong S1P receptor modulatory action.

Abstract: Novel cephem compounds represented by a formula [I] and pharmacologically admissible salts or capable of physiologically hydrolyzable nontoxic esters thereof are disclosed. ##STR1## [wherein R.sup.1 indicates a straight-chain or branched lower alkyl group, which may be substituted by carboxyl group which may be protected, trityl group, hydrogen atom or fluorine-substituted lower alkyl group, R.sup.2 indicates a hydrogen atom, metal atom, protective group for carboxyl group or ester residue producible hydrolyzable ester in vivo, R.sup.3, R.sup.4, R.sup.5 and R.sup.6, which may be identical or different, indicate hydrogen atoms, halogen atoms, straight-chain or branched lower alkyl groups, which may be substituted, mercapto groups, which may be substituted, lower alkylamino groups, hydroxyl groups, which may be protected, lower alkoxy groups, lower alkanoyl groups, lower alkoxycarbonyl groups, or lower alkylenedioxy groups, which may be substituted, being maybe formed with R.sup.3 and R.sup.4, R.sup.