Table 2.

Extraction of friedelin using Soxhlet methods from different plant sources.

Plant	Plant Material	Extraction Condition	Solvent	Friedelin Concentration	References
Quercus cerris	Cork	120 mL solvent, 1 bar pressure, ~3 g biomass, 8 h.	Methanol	12.1 wt %	[34]
			Ethanol	15.2 wt %
			Dichloromethane	23.7 wt %
			Petroleum ether	41.3 wt %
Quercus cerris	Cork	NA	Dichloromethane	26.03 wt %	[89]
Maytenus aquifolium	Leaves	10 g plant material with successive hexane and chloroform as an extraction solvent for 20 h each	Hexane	0.49 wt %	[90]
Dombeya torrida	Bark	1 kg of the stem bark powder extracted with chloroform for 48 h	Chloroform	NA	[49]
Garcinia rubroechinata	Leaves	500 g of the dry leaf powder extracted with n-hexane followed by methanol for 24 h	n-hexane followed by methanol	3.0 wt %	[60]
Putranjiva roxburghii	leaf and bark	50 g of dried powder extracted with Chloroform for 6 h.	Chloroform	0.003% w/w in leaf extract, 0.04% w/w in bark extract	[41]

NA—Not available.