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              Hydrolysis of melatonin to 5-MeO-tryptamine (Mexamine)
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From U.S. 4,772,726: 

42g melatonin taken up in 300g isobutanol. Add 30g NaOH and 3g sodium dithionite. 
Reflux 2h @ 105 deg. under N2. Cool mixt. ext with 500g water. Aqueous phase 
conatins sodium acetate and excess NaOH-seperate. Acidify isobutanol phase to pH 
2 with 32% HCl. Concentrate solution to induce crystallization of 36g crude mexamine. 
Recrystallize from 96% EtOH to obtain 30g white crystalls of mexamine of 98.5% purity. 
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