EGTA-AM (EGTA Acetoxymethyl ester) is a calcium chelator, a metabolic biomarker of early-onset preeclampsia and late-onset preeclampsia.

(+/-)-Longamide (6,7-dibromo-4-hydroxy-1H,2H,3H,4H-pyrrolo[1,2-a]pyrazin-1-one) is a marine derived natural products found in Sponge Homaxinella sp.

BIS-TRIS propane (BTP), a novel multidentate ligand of nickel- and cobalt-based spin clusters, is a metal chelator. BIS-TRIS propane is often used as a zwitterionic buffer for PCR and protein crystallization studies.