[Tc].C#NCc1ccc2OCOc2c1.C#NCc3ccc4OCOc4c3.C#NCc5ccc6OCOc6c5.C#NCc7ccc8OCOc8c7.C#NCc9ccc%10OCOc%10c9.C#NCc%11ccc%12OCOc%12c%11