pent-2-enedioic acid (E)-pent-2-enedioic acid 1724-02-3 628-48-8 505-36-2 2-Pentenedioic acid EINECS 217-027-0 Pent-2-ene-1,5-dioic acid NSC227882 (E)-glutaconic acid 369535_ALDRICH T5370800 49360_FLUKA (E)-Glutaconate C02214 Glutaconic acid trans-Glutaconate trans-Glutaconic acid CHEBI:15670 (2E)-pent-2-enedioic acid CHEBI:24309