butyric acid1-butanoic acid1-butyric acid1-propanecarboxylic acid4:0BUTANOIC ACIDButanoateButanoic acidButtersaeureButyric acidC4:0CH3-[CH2]2-COOHacide butanoiqueacide butyriquebutanic acidbutoic acidbutyric acidethylacetic acidn-butanoic acidn-butyric acidpropanecarboxylic acidpropylformic acid