Yosioka, I/ Nakanishi, T/ Kitagawa, I 1971: Lichen triterpenoids. III. The final conclusion on the stereostructure of zeorin and its correlation with leucotylin. The structure of leucotylin. - Chem. Pharm. Bull. [Japan]20: 147-156. [RLL List # 88 / Rec.# 20692] Keywords: ZEORIN / LEUCOTYLIN / TRITERPENOIDS / CHEMISTRY