Assertion: ephedrine | /r/HasAspect | no substituent
Facets:
value: on the phenyl
type: OTHER
Source sentences:
text: However, the structure of ephedrine differs from that of synephrine at two different positions: ephedrine has no substituent on the phenyl ring where synephrine has a 4-OH group, and ephedrine has a methyl group on the position α- to the N in the side-chain, where syneprine has only a H atom.