Velutinic acid, a new friedelane derivative from Xylosma velutina (Flacourtiaceae) Chang, P. T. Otto ; Cordell, Geoffrey A. ; Fong, Harry H. S. ; Farnsworth, Norman R. Abstract Publication: Phytochemistry Pub Date: January 1977 DOI: 10.1016/S0031-9422(00)88804-4 Bibcode: 1977PChem..16.1443C