Research Centre, Chinoin Pharmaceutical and Chemical Works, H-1325 Budapest, Hungary, Institute of Organic Chemistry, Eotuos University, H-1445 Budapest, Hungary, and Institute of General and Analytical Chemistry, Technical University, H-1111 Budapest, Gelllrt ter 4, Hungary ... The synthesis, the UV, CD, and 'H, 13C, and 15N NMR characterization, and the X-ray diffraction analysis of a series of methyl-substituted 4-0~0-1,6,7,8,9,9a- ...