1: methyl (6aR,9S)-4,7-ditosyl-4,6,6a,7,8,9-hexahydroindolo[4,3-fg]quinoline-9-carboxylate in tetrahydrofuran T=-78°C; 0.1 h; Inert atmosphere; 2: formaldehyd With sodium cyanoborohydride; acetic acid in methanol; water T=20°C; 2 h; optical yield given as percent de;