Ensaio sobre o cinchonino, e sobre sua influencia em a virtude da quina, e de outras cascas.

Gomes obtained a substance, which he named cinchonino, from cinchona bark. That it contained the active principle of cinchona was later proved by Pelletier and Caventou. For an English translation of the paper, see Edinb. med. surg. J., 1811, 7, 420-31.