According to their biosynthetic origin, the corynantheine-type alkaloids are distinguished by the orientation of H-15 being R.8 The ROESY correlations of H-15/H2-19, H-15/H-21b, and H-21b/
According to their biosynthetic origin, the corynantheine-typealkaloids are distinguished by the orientation of H-15 being R.8The ROESY correlations of H-15/H2-19, H-15/H-21b, and H-21b/