1: 5-methyl-1H-indole With ethylmagnesium bromide in tetrahydrofuran T=-78°C; 0.133333 - 0.166667 h; 2: 2-nitrobenzoic acid chloride in tetrahydrofuran T=-78 - 20°C; 4.16667 h; 3: With hydrogenchloride; methanol; lithium hydroxide more than 3 stages;