Triterpenoids from the bark of Ruptiliocarpon caracolito
2010
ʻĀṣim, Muḥammad | Hussien, Helmi | Poveda, Luis | Arnason, J. T. | Durst, Tony
Five spirocaracolitone triterpenoids were isolated from the dichloromethane-soluble fraction of the bark of Ruptiliocarpon caracolito, and their structures were determined mainly by application of 1D and 2D NMR spectroscopy. Two known CD-spirotriterpenoids were also isolated from the same source. This brings the total number of known CD-spirotriterpenoids from this source to 17. The discovery of such a large number of closely-related compounds in a single species represents an excellent example of phytochemical redundancy as a defense mechanism.
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