Substituents are attached to the 2 and 3 positions of the quinazolone ring.
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3-(2,5-dimethylphenyl)-2-methylquinazolin-4(3H)-one
4(1H)-Quinazolinone, 2-[2-(3-amino-4-hydroxyphenyl)ethenyl]-
(2S)-(4-bromophenyl)-3-<(S)-lactyl>-5-methylthio-2,3-dihydro-1,3,4-thiadiazole