I had tested
Past perfect I conjugation of test.

test

I had tested effervescent delivery with L-dopa and other substances in the past and found it to be highly effective in combination with Chaperone Molecules.
J'avais testé l’effectivité de l’effervescence avec la L-dopa et d'autres substances dans le passé et j’ai trouvé fort intéressant la combinaison avec des molécules chaperons.
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