active acetate
Biochemical term referring to acetyl-CoA or a related activated form of acetate in metabolic pathways.
Active acetate plays an important role in the citric acid cycle.
アセチルCoA is the specific compound often meant by 活性酢酸; 活性酢酸 is a broader, somewhat older term.
Compound of 活性 (active) and 酢酸 (acetic acid), likely a calque from English 'active acetate'.