Piperonylic acid
2H-1,3-Benzodioxole-5-carboxylic acid
 10234  C8H6O4  166.131
 InChI=1S/C8H6O4/c9-8(10)5-1-2-6-7(3-5)12-4-11-6/h1-3H,4H2,(H,9,10)
 VDVJGIYXDVPQLP-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 OC(=O)c1ccc2c(c1)OCO2