Levocetirizine Dihydrochloride was prepared from benzoyl chloride by acidylation,hydrogenation,cyclization with an overall yield of 8.05%.
以苯甲酰氯为,酰化,还,环等反应成西替利嗪盐酸盐,反应总收率为8.05%。
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Many drugs exist, like benzoyl peroxide, which kills specific acne-causing bacteria, salicylic acid, which helps to remove dead skin blockages, retinoids, which reduce sebum production, and a variety of others —though some drugs can have severe side effects.
目有多药物,像是过氧化苯甲酰,那能消灭特定的致痘细菌,水杨酸,有助去除死皮造成的阻塞,维他命 A 酸,那能减少皮脂生成,还有其它多药物--不过有些药物可能会造成严重副作用。