loratadine c22h23cln2o2 molecule. it is antihistamine, is used to treat allergies. structural chemical formula on the dark blue

allergies allergy antihistamine atom atomic blue c22h23cln2o2 carbon chemical chemistry chlorine compound dark drawing drug fever flat formula hay histamine hives hydrogen icon illustration loratadine medication model molecular molecule nitrogen nonsedating organic oxygen rhinitis sedating structural structure urticaria vector white