19____Z1_1 CC(=O)c1ccc(cc1)O[Cu] 1 18____Z1_2 CC(=O)c1ccc(cc1)O[Cu] 1 20____Z1_1 CC(=O)c1ccc(cc1)O[Cu] 1 17____Z1_1 CC(=O)c1ccc(cc1)O[Cu] 1