Karaviloside is any of several related cucurbitane triterpenoid glycosides found in bitter melon vine (Momordica charantia). They include:
Karavilosides I, II, and III can be extracted from the M. charantia fruit with methanol. Karavilosides III, V, and XI can be extracted from the M. charantia roots by methanol.
References
Karaviloside Wikipedia(Text) CC BY-SA