“…For example, as shown in Fig. 1, caffeine, a well-known central nervous system stimulator with a mode of action of antagonizing adenosine receptors and inhibiting phosphodiesterase, 5,6 has an important functions in removing fatigue, restoring alertness of spirit, etc., 7 theophylline has significant pharmaceutical activities and acts as cardiac stimulator, diuretic, bronchodilator, etc., [8][9][10][11] aminophyline, which is a salt composed of theophylline and ethylenediamine, has been widely used in the treatment of bronchial asthma for many years, 4,12 3-isobutyl-1-methylxanthine (IBMX), which has a mode of action of cyclic nucleotide phosphodiesterase inhibition, can be used as bronchodilator, 4,13 and pentoxifylline, propentofylline, and doxofylline have pharmaceutical properties as hemorheological agents, 14 neuroprotective agents, antioxidants, 15 and anti-inflammatory agents. 16 Furthermore, there are a few reports related to methylxanthines research in pesticide chemistry.…”