c1ccccc1
Reaction SMIRKS %5BN%3A1%5D%28%5BH%3A3%5D%29%5B%236%3A2%5D%3E%3E%5BN%3A1%5D%28%5BO%5D%5BH%3A3%5D%29%5B%236%3A2%5D