There's also an N1—H1⋯O4 hydrogen bond concerning the indole nitrogen and another oxygen of your carboxylate group with a symmetry-generated fumarate dianion (Table two Incredibly protected shipping and prime excellent of solutions. Uncomplicated to search out all the information you may need. I found my shop, many thanks! Michael H https://5-meo-dalt-freebase81357.hyperionwiki.com/586814/5_meo_dalt_freebase_an_overview