[Zn].c1ccc(cc1)Cn2ccc(cc2)C3=C4C=CC(=N4)C(c5ccn(cc5)Cc6ccccc6)=C7C=CC(N7)=C(c8ccn(cc8)Cc9ccccc9)C%10=NC(C=C%10)=C(c%11ccn(cc%11)Cc%12ccccc%12)C%13=CC=C3N%13