FIGURE 1.
Terpenoid structures and new methoxy structures in R. rugosa extracts. (a) Structure of isolated compounds 1–13 of R. rugosa. (b) Key 1H‐1H COSY and HMBC correlations of 1 (c) Key 1H‐1H COSY and HMBC correlations of 5
Terpenoid structures and new methoxy structures in R. rugosa extracts. (a) Structure of isolated compounds 1–13 of R. rugosa. (b) Key 1H‐1H COSY and HMBC correlations of 1 (c) Key 1H‐1H COSY and HMBC correlations of 5