Compound capable of binding S1P receptor and pharmaceutical use thereof

A compound represented by formula (IA-2-1):

• wherein ring A represents a cyclic group;
• ring B represents a dihydronaphthalene group, an indene group, or a 6,7-dihydro-5H-benzo[7]annulene group which may further have a substituent(s);
• X represents —CH2—, —(CH2)2—, —(CH2)3—, —(CH2)4—, —(CH2)5—, —(CH2)6—, —(CH2)7—, —(CH2)8—, —O—, —CH2—O—, —(CH2)2—O—, —(CH2)3—O—, —(CH2)4—O—, —(CH2)5—O—, —CH═CH—CH2—O—or -cyclopropylene-CH2—O—, which each may be substituted, in which the right side of each group is bound to ring B;
• ring D1 represents a nitrogen-containing heterocyclic group;
• Y1-3 represents methylene which may have a substituent(s), ethylene which may have a substituent(s), propylene which may have a substituent(s) or propenylene which may have a substituent(s);
• R27 represents a hydrogen atom, a halogen atom, or C1-4 alkyl which may be substituted with 1 to 3 halogen atoms;
• t is 0 or an integer of 1 to 5;
• R1 represents a substituent of ring A;
• n represents 1;
• m is 0 or an integer of 1 to 7, and when m is 2 or more, plural R1s are the same or different;
• when X is —O—or —CH2—O—and ring A is phenyl, m is an integer of 1 to 5, or a salt thereof.