Fig. 7.

Cucurbitacins from the karavilagenin set (17–36) (Ramalhete et al. 2009a, b). Compounds 18 – 35 were obtained by acylation reactions (Ramalhete et al. 2011b, 2016). Compounds 17 and 36 were firstly isolated from M. charantia fruits (Nakamura et al. 2006; Matsuda et al. 2007)