highly significantp < 0.01
The 3-methylbutanoic acid ethyl ester (fruity aroma) was produced by the biosynthesis of the branched chain amino acid, l -leucine, as a precursor and shows the highly significant largest OAV in the Jiangxiang (OAV: 12525.24) (p < 0.01) and Jiaodixiang (OAV: 16964.21) (p < 0.01) typical base liquors.