Laudanosine is a recognized metabolite of atracurium and cisatracurium.

Methyl Nonadecanoate is a fatty acid methyl ester.

4'-Hydroxy-2,4-dimethoxychalcone is a naturally occurring chalcone derivative from the herbal resin of the red geranium Dragon's Blood.4'-Hydroxy-2,4-dimethoxychalcone possesses a wide range of biological activities including anti-malarial, anti-bacterial, anti-fungal, and anti-protozoa activity.