丙酮酸 Traditional form: 丙酮酸 Pinyin (reading): bǐngtóngsuān Definitions: pyruvic acid CH3COCOOH Characters: 丙 - third; 3rd heavenly stem 酮 - ketone 酸 - tart, sour; spoiled; acid Traditional characters: 丙 - third; 3rd heavenly stem 酮 - ketone 酸 - tart, sour; spoiled; acid