Adjective
Valerianic; specifically, designating any one of three metameric acids, of which the typical one (called also inactive valeric acid), C4H9CO2H, is obtained from valerian root and other sources, as a corrosive, mobile, oily liquid, having a strong acid taste, and an odor of old cheese.
Source: Webster's dictionaryA valeric acid substituent is attached to one of the carbon atoms of the tetrahydrothiophene ring. Source: Internet
When standardized, it is done so as a percentage of valerenic acid or valeric acid. Source: Internet