Abstract: Amino alcohol compounds and phosphonic acid compounds having excellent immunosuppressive activity, pharmacologically acceptable salts thereof and pharmacologically acceptable esters thereof, and pharmaceutical compositions comprising such compounds, the compounds having the following formula: wherein R1 and R2 each represent hydrogen, or a protecting group of the amino group; R3 represents hydrogen, or a protecting group of the hydroxyl group; R4 represents a lower alkyl group; n is 1 to 6; X represents oxygen or nitrogen, which is unsubstituted or substituted with a lower alkyl group; Y represents ethylene; Z represents a C1–C10 alkylene; R5 represents an aryl group; and R6 and R7 each represents hydrogen; provided that when R5 represents hydrogen, then Z represents a group other than a single bond or a straight chain C1–C10 alkylene group.

Abstract: Amino alcohol compounds and phosphonic acid compounds having excellent immunosuppressive activity, pharmacologically acceptable salts thereof and pharmacologically acceptable esters thereof, and pharmaceutical compositions comprising such compounds, the compounds having the following formula: wherein R1 and R2 each represent hydrogen, or a protecting group of the amino group; R3 represents hydrogen, or a protecting group of the hydroxyl group; R4 represents a lower alkyl group; n is 1 to 6; X represents oxygen or nitrogen, which is unsubstituted or substituted with a lower alkyl group; Y represents ethylene; Z represents a C1-C10 alkylene; R5 represents an aryl group; and R6 and R7 each represents hydrogen; provided that when R5 represents hydrogen, then Z represents a group other than a single bond or a straight chain C1-C10 alkylene group.