on atoms, a nitro group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; n and m each denotes an integer of 0 to 4; when n Is larger than 1, the plurality of R11 may bind to each other to form a ring; when m is larger than 1, the plurality of R12 may bind to each other to form a ring; A denotes oxygen or SO2; and the substituent is a halogen, an alk