Assertion: amphetamine's acid | /r/HasProperty | approximately 4%
Facets:
Source sentences:
text: Additional synthetic routes include reacting phenylacetic acid and acetic add in a combustion tube containing thorium oxide or manganese oxide catalyst (approximately 5%); reacting benzyl cyanide, ethyl acetate and sodium ethoxide to form α-phenyl-acetoacetonitrile followed by hydrolysis and decarboxylation (approximately 10%); and reacting benzaldehyde and nitroethane in butylamine to form 1-phenyl-2-nitropropene followed by reduction with iron and hydrochloric acid (approximately 4%).