A dereplication strategy using UPLC-QTOF/MS, the HMAI method, and NMR spectroscopy led to the identification of five main steroidal saponins (-), including three previously unknown compounds named macroacanthosides A-C (-), in a bioactive fraction of . The major saponins were isolated, and some of them together with the saponin-rich fraction were then evaluated for phytotoxicity on a standard target species, . The inhibition values exhibited by the pure compounds were confirmed to be in agreement with the phytotoxicity of the saponin-rich fraction, which suggests that the saponin fraction could be applied successfully as an agrochemical without undergoing any further costly and/or time-consuming purification processes. The NMR data of the pure compounds as well as of those corresponding to the same compounds in the fraction were comparable, which indicated that the main saponins could be identified by means of this replication workflow and that no standards are required.
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| http://dx.doi.org/10.1021/acs.jnatprod.1c00663 | DOI Listing |
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