+/-)mcpg;[+/-]-mcpg;(+/-)-alpha-methyl-(4-carboxyphenyl)glycine;(rs)-alpha-methyl-4-carboxyphenylglycine;(rs)-a-methyl-4-carboxyphenylglycine;(rs)-mcpg;(+/-)-a-methyl-(4-carboxyphenyl)glycine;(+-)-a-methyl-4-carboxyphenylglycine met abotropic glutamat