English to Spanish Medical Medical: Dentistry pain management

I am translating a text book about pain management in dentistry into Spanish. I am having some difficulty with the part of the following sentence in quotation marks.


Only recently has the probable mechanism of action of salicylates been identified as the inhibition of prostaglandin synthesis, which "blocks the initial oxygenation of arachidonic acid by cyclooxygenase."

Mi intento hasta ahora, deje la parte que me cuesta entre comillas.

La inhibición de la síntesis de prostaglandinas bloquea "la oxigenación inicial del ácido araquidónico por parte de la ciclooxigenasa" y sólo hace poco se identificó que esta inhibición es el mecanismo de acción más probable de los salicilatos.

Please let me know what you think, thanks.

If you need more context here is the whole paragraph:

Salicylates, in the form of willow bark, were introduced to medicine as analgesics in 1763. Salicyclic acid was derived from salicin, the active agent in willow bark, in 1838. The synthesis of acetylsalicylic acid (aspirin) eventually resulted in the displacement of salicylate derived from naturally occurring sources ( Box 7–1 ). Since its introduction in 1899, aspirin has been widely used for its analgesic, antipyretic, antiinflammatory, and antirheumatic effects. Only recently has the probable mechanism of action of salicylates been identified as the inhibition of prostaglandin synthesis, which "blocks the initial oxygenation of arachidonic acid by cyclooxygenase."