c1ccccc1
Reaction SMIRKS %5BN%3A1%5D1%5BC%3A2%5D%5BC%3A3%5D%3D%5BC%3A4%5D%5BC%3A5%5D1%3E%3E%5BN%3A1%5D1%5BC%3A2%5D%3D%5BC%3A3%5D%5BC%3A4%5D%3D%5BC%3A5%5D1