1: With sodium hydroxide; α-chymotrypsin in water T=32 - 33°C; pH=7.2; 48 h; 2: With sodium hydroxide in ethanol T=20°C; 24 h; Further stages.;

<b>Multi-step reaction with 2 steps<br /> </b>1.1: aq. NaOH / ethanol / 24 h<br />1.2: 25.4 g / ethyl acetate / 2 h / Heating<br />2.1: SOCl₂ / 2 h / Heating<br /> <br /> &nbsp;