Kitazawa, Makio published the artcileStudies on the synthesis of antiulcer agents. VI. Synthesis and antiulcer activity of dihydrobenzofuranone derivatives, Quality Control of 16909-09-4, the publication is Yakugaku Zasshi (1989), 109(10), 718-36, database is CAplus and MEDLINE.
Dimethyldihydrobenzofuranones I [R = OH, OEt, (un)substituted amino], II (R1 = 5-, 6-, or 7-CH:CHCOR2; R2 = piperidino, morpholino; R3 = 7-, 6-, or 5-OMe, Br, NO2, NH2, NHAc, H, Me, CO2Et), III (n = 0-2; R4 = OH, OEt, substituted amino), and IV [R5 = (un)substituted amino] were prepared and tested for antiulcer activity. I (R = piperidino, morpholino) showed the highest activity.
Yakugaku Zasshi published new progress about 16909-09-4. 16909-09-4 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Benzene,Ether, name is (E)-3-(2,4-Dimethoxyphenyl)acrylic acid, and the molecular formula is C11H12O4, Quality Control of 16909-09-4.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia