Seed oils of
Sida acuta and
Sida rhombifolia were found to contain sterculic (11.0, 10.8%) and malvalic (1.7, 2.0%) acids respectively, in addition to the normal fatty
acids. Co-occurrence of these acids was established by gas liquid chromatography of the silver nitrate-methanol-treated methyl
esters using
Sterculia foetida esters as a reference standard. This gas liquid chromatography technique of quantitation was found most suitable to estimate
these acids in low level cyclopropenoid acid-containing seed oils.