c1ccccc1
Reaction SMIRKS %5B*%3A1%5D%5BP%3A2%5D%28%3DS%29%28%5B*%3A3%5D%29%5B*%3A4%5D%3E%3E%5B*%3A1%5D%5BP%3A2%5D%28%3DO%29%28%5B*%3A3%5D%29%5B*%3A4%5D