Myrrhain A: Structural Reassignment Highlights the Relevance of Plasticizer Contamination in Chemical and Bioactivity Studies

The proposed structure for myrrhain A, containing an unlikely 1,2-di-t-butylbenzofuran substitution pattern, was reassigned as a known plasticizer by direct spectroscopic comparison and Computer Assisted Structure Elucidation (CASE). Concerningly, plasticizers and their precursors, degradation and/or oxidation products, arising from environmental or laboratory contamination, continue to be misconstrued as natural products.