D-Citronellol is found in herbs and spices as well as bilberry. D-Citronellol is a constituent of black cumin (Nigella sativa) seeds. D-Citronellol is a common constituent of plant oils especially in the Rutaceae.

P-gb-IN-1 is a potent P-glycoprotein (P-gp) inhibitor that exhibits reverse activity by inhibiting P-gp outflow. P-gb-IN-1 has been shown to inhibit P-gp by hydrogen bonding with residues Asn 721 and Met 986. P-gb-IN-1 showed low toxicity in MCF-7/ADR cells.

4'-hydroxy-6,7,8,3'-tetramethoxyflavonol is a natural product for research related to life sciences.