Usage: The product is used for synthesizing Doxycycline, Persantin, Naproxen, Amoxicillin, Cerfadroxil Intermediate, Usage: The product is used for synthesizing Doxycycline, ... Persantin, Naproxen, Amoxicillin, Cerfadroxil Intermediate, it is also used for synthesizing oxyethyl quinoline ...