The present invention relates to certain pyrazole derivatives of Formula (I) and pharmaceutical compositions thereof that modulate the activity of the 5-HT2A serotonin receptor and their uses for the treatment of REM sleep behavior disorder.本發明係關於調節5-HT2A血清素受體活性之特定的式(I)吡唑衍生物和其醫藥組成物,以及其用於治療REM睡眠行為障礙之用途。