Lipoxin B4 (LXB4) methyl ester is a lipid soluble prodrug form of the transcellular metabolite LXB4 (Item No. 90420). LXB4 is a positional isomer of LXA4 (Item No. 90410) produced by the metabolism of 15-HETE (Item No. 34700) or 15-HpETE (Item No. 4472