[CH:1](/[CH:4]1[C:12]2[C:7](=[CH:8][CH:9]=[CH:10][CH:11]=2)[CH2:6][CH2:5]1)=[CH:2]\[CH3:3]>CO>[CH2:1]([CH:4]1[C:12]2[C:7](=[CH:8][CH:9]=[CH:10][CH:11]=2)[CH2:6][CH2:5]1)[CH2:2][CH3:3]A MeOH (6 mL) solution of the trans-propenylindane acid from 144b (11.8 mg, 0.18 mmol) was hydrogenated under 50 psi H2 for 1 h to give propylindane acid. MS Found: (M+Na)+=317.
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