Fig. 4. Key 1H–1H in Comprehensive characterization of polyacetylenes and diterpenes from the underground parts of Solidago altissima L. and their contribution to the overall allelopathic activity

Fig. 4. Key 1H–1H COSY (bold dark lines), HMBC (red arrows), and NOESY (blue arrows) correlations of compounds 2–4. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)