Figure 2.
Structure elucidation of YPM F (6) and YPM G (7). (A) HPLC analysis of the YPMs 1-7 in M. yangpuensis DSM 45577 with or without the addition of the resins. (I) Fermentation without resins; (II) Addition of 3% (w/v) HP2MGL resins in the fermentation medium at the beginning of the fermentation; (III) Addition of 3% (w/v) HP2MGL resins into the fermentation medium at 48 h; (IV) The addition of 3% (w/v) SP825L resins into the fermentation medium at 48 h. (B) Key 1H−1H COSY (red) and HMBC (blue arrow) correlations of 6 and 7. (C) Key ROESY correlations (green arrow) of 6 and 7.