DL-erythro/threoSphinganine (d16:0) is a sphingolipid that is decreased in rats following long-term, low-dose administration of dimethoate and is used as a biomarker for dimethoate exposure. It has been found in the fermentation broth of Bacterium SRCnm, which has antimicrobial and antioxidant activities. This product is a mixture of sphinganine (d16:0), L-erythrosphinganine (d16:0), D-threosphinganine (d16:0), and L-threosphinganine (d16:0).