The story
Probably from chlo(ro)- + p(yr)id(ine) + -o- + -grel (“platelet aggregation inhibitor”).
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: An oral antiplatelet agent used to inhibit blood clots in coronary artery disease, peripheral vascular disease, and cerebrovascular disease, having the chemical formula C₁₆H₁₆ClNO₂S Full definition →
Probably from chlo(ro)- + p(yr)id(ine) + -o- + -grel (“platelet aggregation inhibitor”).
Etymology from Wiktionary, CC BY-SA 4.0.