Showing structure for [(1r,11r,12r,13r,14e,19s,21s)-10-{3-ethyl-8-methoxyindolo[2,3-a]quinolizin-2-yl}-11-hydroxy-8,16-diazahexacyclo[11.5.2.1¹,⁸.0²,⁷.0¹⁶,¹⁹.0¹²,²¹]henicosa-2,4,6,9-tetraen-14-ylidene]acetic acid