tetracyclic triterpene
http://purl.jp/bio/4/id/200906039690042142
http://purl.jp/bio/4/id/200906097018851431
http://jglobal.jst.go.jp/en/detail?JGLOBAL_ID=200906039690042142
http://purl.jp/bio/4/subject/CA06
http://purl.jp/bio/4/id/200906084081407822