2-[(11Z)-11-(3-dimethylaminopropylidene)-6H-benzo[c][2]benzoxepin-2-yl]acetic acid 2-[(11Z)-11-(3-dimethylaminopropylidene)-6H-benzo[c][2]benzoxepin-2-yl]ethanoic acid 11-((Z)-3-(Dimethylamino)propylidene)-6,11-dihydrodibenz(b,e)oxepin-2-acetic acid