[Sn](OC(=O)c1ccccc1)OC(=O)c2ccccc2.c3ccc(cc3)C4=C5C=CC(=N5)C(c6ccccc6)=C7C=CC(N7)=C(c8ccccc8)C9=NC(C=C9)=C(c%10ccccc%10)C%11=CC=C4N%11