https://www.thevespiary.org/rhodium/Rhodium/chemistry/mdp2p.leuckart.txt (https://www.thevespiary.org/rhodium/Rhodium/chemistry/mdp2p.leuckart.txt)
"Add 23g 3,4-methylenedioxyphenylacetone to 65g HCONH2 (formamide)
and heat at 190 deg for five hours. Cool, add 100ml H20, extract with
C6H6 (benzene) and evaporate in vacuum the extract. Add 8ml MeOH
(methyl alcohol -- methanol) and 75ml 15% HCl to residue, heat on
water bath two hours and extract in vacuum (or basify with KOH and
extract the oil with benzene and dry, evaporate in vacuum) to get
11.7 g 3,4-methylenedioxyamphetamine (MDA)."
This person just evaporates the extract in vacuum and gets 11.7g? Swim thought that was weird from the start.