dexibuprofen levibuprofen (R)-alpha-methyl-4-(2-methylpropyl)benzeneacetic acid Beilstein:3590021 InChI=1S/C13H18O2/c1-9(2)8-11-4-6-12(7-5-11)10(3)13(14)15/h4-7,9-10H,8H2,1-3H3,(H,14,15)/t10-/m1/s1 206.28082 C13H18O2 CC(C)Cc1ccc(cc1)[C@@H](C)C(O)=O Beilstein:3590023 chebi_ontology (2R)-2-(4-isobutylphenyl)propanoic acid 206.13068 HEFNNWSXXWATRW-SNVBAGLBSA-N (2R)-2-[4-(2-methylpropyl)phenyl]propanoic acid (-)-ibuprofen CAS:51146-57-7 0 CHEBI:47835 ibuprofen