A heparin-like compound isolated from a marine crab rich in glucuronic acid 2-O-sulfate presents low anticoagulant activity

► Report of a crab heparin-like compound rich in 2-O-sulfated glucuronic acid units. ► COSY, TOCSY, NOESY and HSQC were used to trace the spin systems of the compound. ► Degradation products of the compound by heparinases confirmed the NMR data. ► Degree of sulfation of the compound is not sufficient for anticoagulant activity.