Chiral dihydroxylation of acronycine: absolute configuration of natural cis-1,2-dihydroxy-1,2-dihydroacronycine and cytotoxicity of (1R,2R)- and (1S,2S)-1,2-diacetoxy-1,2-dihydroacronycine - Costes, N; Michel, S; Tillequin, F; Koch, M; Pierré, A; Atassi, G (J Nat Prod, 1999)