There's also an N1—H1⋯O4 hydrogen bond between the indole nitro­gen and one other oxygen on the carboxyl­ate group over a symmetry-generated fumarate dianion (Desk 2 Really protected supply and leading good quality of solutions. Easy to locate all the info you may need. I found my shop, thanks! Michael H https://5-meo-daltfreebase62581.yourkwikimage.com/658910/the_fact_about_5_meo_dalt_freebase_that_no_one_is_suggesting