Lpa receptor antagonist

A compound of formula (I):

• wherein R represents an aliphatic hydrocarbon group which may be substituted, or a cyclic group which may have a substituent(s);
• G represents a bond or a spacer having from 1 to 8 atoms in its principle chain;
• T represents —CH2—, or a spacer having one atom in its principle chain, the principle chain containing a hydrogen bond acceptable group which may have a substituent(s);
• J represents a nitrogen atom or a carbon atom;
• B represents an aliphatic hydrocarbon group which may be substituted, or a cyclic group which may have a substituent(s);
• K represents (1) a bond, or (2) a spacer having from 1 to 8 atoms in its principle chain which may form a ring together with a substituent of the cyclic group in R, the ring D or a substituent on the ring D;
• Q represents (1) a bond, or (2) a spacer having from 1 to 8 atoms in its principle chain which may form a ring together with the cyclic group in R, a substituent of the cyclic group in R or K;
• ring D represents a cyclic group which may have an additional substituent(s);
• L represents a bond, or a spacer having from 1 to 3 atoms in its principle chain;
• ring E represents a cyclic group which may have an additional substituent(s);
• M represents a bond, or a spacer having from 1 to 8 atoms in its principle chain;
• A represents an acidic group;
• and
• t represents 0 or 1, or
• a salt thereof.