Assertion: novel pyridine | /r/CapableOf | bear dimethyl groups
Facets:
value: at r
type: LOCATION
Source sentences:
text: In this article, PyDPM, a novel pyridine containing TPM derivative bearing dimethyl groups at R 2 and R 3 positions, was prepared considering that the introduction of ortho-methyl substituents can effectively enhance the T g s of the final polymers.