Characterization of sugi (Cryptomeria japonica) bark extracts

The hexane and methanol-extracts of inner and outer barks of sugi (Cryptome ria japonica) were analyzed. The neutral fraction of the bark extracts cons isted mainly of phyllocradanol and abietatriene type diterpenes. The barks contained a small amount of sandaracopimarinol, known as a major component in heartwood of sugi. An acidic solid was the major component in the methan ol extract of barks. Based on alkali fusion and ozonolysis, it was surmised that the solid was a suberin polymer containing carboxyl groups and ester bonds of aliphatic acid and an aromatic ring.