Stereostructural studies on the 4-hydroxylated Annonaceous acetogenins: a novel use of Mosher ester data for determining relative configuration [between C(4) and C(36)] - Hoye,T.R.; Hanson,P.R.; Hasenwinkel,L.E.; Ramirez,E.A.; Zhuang,Z. (Tetrahedron Lett, 1994)