| 摘要 |
Novel benzophenone derivatives of the formula <IMAGE> I wherein X and X1 are individually selected from the group consisting of hydrogen, halogen, alkyl of 1 to 5 carbon atoms, alkoxy of 1 to 5 carbon atoms, alkylthio of 1 to 5 carbon atoms, CF3O-, CF3S- and CF3-, R is selected from the group consisting of hydrogen and alkyl of 1 to 5 carbon atoms and R1 is an aliphatic hydrocarbon of the formula -(CH2)a-CH = CH-(CH2)b-H or -(CH2)a-CH2-CH2-(CH2)b-H where a and b are whole numbers between 0 and 16 and whose sum is not greater than 16 which have a very clear analgesic activity.
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