Fig. 5From: High tetramethylpyrazine production by the endophytic bacterial Bacillus subtilis isolated from the traditional medicinal plant Ligusticum chuanxiong Hort.Total ion current chromatogram of five strains of endophytic bacteria isolated from RC. The spectra of samples matched well with authentic compounds of HB and TMP, 2,3-BD and 1,1-DAH were identified from MS data library. The retention time was 3.888 min for HB, 4.888 min for 2,3-BD, 11.608 min for 1,1-DAH and 11.898 min for TMPBack to article page