trans-trismethoxy Resveratrol-d4 is intended for use as an internal standard for the quantification of trans-trismethoxy resveratrol by GC- or LC-MS. trans-trismethoxy Resveratrol is a polyketide synthase-derived stilbene originally isolated from Virola cuspidata that has diverse biological activities. It is cytotoxic to several cancer cell lines, including PC3, KB, HT-29, SW480, and HL-60 cells (IC50s =3.6, 10.2, 16.1, 54, and 2.5 μM, respectively). trans-trismethoxy Resveratrol (15 μM) inhibits TNF-α-induced activation of NF-κB in HEK293T cells in a reporter assay. It inhibits angiogenesis in zebrafish embryos when used at a concentration of 0.1 μM.