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Name:4-(4-hydroxy-2-oxo-1-oxaspiro[4.4]non-3-en-3-yl)-3,5-dimethylbenzoic acid
Chemical Formula: C17H18O5
Molecular Weight: 302.3260
m/z: 302.1154 (100.0%), 303.1188 (18.4%), 304.1221 (1.6%), 304.1197 (1.0%)
Elemental Analysis: C, 67.54; H, 6.00; O, 26.46