:C18H32O2
:Huile de chaulmoogra, ''Hydnocarpus kurzii''.
=== Acides cyclopropéniques ===
*'''acide malvalique'''
:18
:C18H32O2
:7-(2-octyl-1-cyclopropenyl)heptanoic acid
:''Hibiscus tiliaceus''
:toxique
*'''acide sterculique'''
:?
:''Ceiba''(~12%), ''Gossypium''(~1%), ''Hibiscus tiliaceus'', ''Sterculia foetida'' (~65-78%)
:toxique