It is also found in Huáng bǎi, one of the fifty fundamental herbs of traditional Chinese medicine, also known also as Cortex Phellodendri, the bark of one of two species of Phellodendron tree: Phellodendron amurense or Phellodendron chinense.
33% huáng bǎi (黃栢 or "yellow fir"), also known as Cortex Phellodendri, the bark of Phellodendron chinense Schneid.