Scullcapflavone II is a tetramethoxyflavone that is flavone substituted by methoxy groups at positions 6, 7, 8 and 6' and hydroxy groups at positons 5 and 2' respectively. It has a role as an anti-asthmatic drug, an EC 1.6.5.2 [NAD(P)H dehydrogenase (quinone)] inhibitor and a plant metabolite. It is a dihydroxyflavone and a tetramethoxyflavone. It is functionally related to a flavone. Skullcapflavone II is a flavonoid derived from Scutellaria baicalensis, a widely used herbal medicine in anti-inflammatory and anticancer therapy in Korea. Skullcapflavone II may have therapeutic potential for the treatment of allergic asthma.

3,4,5-trimethoxybenzoic acid is a benzoic acid derivative carrying 3-, 4- and 5-methoxy substituents. It has a role as a plant metabolite, a human xenobiotic metabolite and a human urinary metabolite. It is a member of benzoic acids and a member of methoxybenzenes. It is functionally related to a benzoic acid. It is a conjugate acid of a 3,4,5-trimethoxybenzoate.