Chemistry is traditionally divided into organic and inorganic chemistry. HPLC of Formula: C4H2Cl2N2, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 141-30-0
The present invention relates to new drug combinations which contain in addition to one or more PDE4-inhibitors at least one NSAID (=non-steroidal anti-inflammatory drug) (2), processes for preparing them and their use in treating in particular respiratory complaints such as for example COPD, chronic sinusitis and asthma. The invention particularly relates to those drug combinations which, in addition to one or more, preferably one PDE4 inhibitor of general formula 1 wherein X is SO or SO2, but preferably SO, and wherein R3 denotes an optionally substituted, mono- or bicyclic, unsaturated, partly saturated or saturated heterocyclic group or an optionally substituted, mono- or bicyclic heteroaryl and wherein R1 and R2 have the meanings given in claim 1, contain at least one NSAID (2), the preparation thereof and the use thereof for the treatment of respiratory complaints.
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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N1464 – PubChem