2-(6,7,8,9-Tetrahydro-5H-benzocyclohepten-5-yl)propionic acid 4-09-00-02152 (Beilstein Handbook Reference) 57421-31-5 5H-Benzocycloheptene-5-acetic acid, 6,7,8,9-tetrahydro-alpha-methyl- 6,7,8,9-Tetrahydro-alpha-methyl-5H-benzocycloheptene-5-acetic acid BRN 3304610