Collagen-IN-1 (compound 3) is an ortho-carbonyl hydroquinone derivative exhibiting selective inhibition of collagen. It non-competitively inhibits agonist-induced platelet aggregation, with an IC50 value of 1.77 μM. Collagen-IN-1 effectively reduces the expression of P-selectin, activation of glycoprotein IIb/IIIa, and release of adenosine triphosphate and CD63 from platelets. This compound holds promise for research into platelet-related thrombosis diseases [1].