we produce P-Toluene Sulfonic Amide (PTSA) , P-toluene Sulfonyl Chloride (PTSC) , O/P-toluene sulfonamide(OPTSA) , 4-Hydroxybenzaldehyde(PHBA) , O-Toluene Sulfonamide , N-ethyl-o/p-toluene sulfonamide our email address is richardxuc at gmail.com we are looking forward to your inquiry