1,2-oxazole ISOXAZOLE 288-14-2 NSC 137774 InChI=1/C3H3NO/c1-2-4-5-3-1/h1-3 CHEBI:35595 isooxazole NSC137774 ZINC01420779 151637_ALDRICH 1-Oxa-2-azacyclopentadiene EINECS 206-018-7