- 1. An unsaturated cyclic compound, C5H4O2, of which two varieties are known, a and g. g-pyrone is the parent substance of several natural yellow dyestuffs. Source: webster
- 2. An unsaturated cyclic compound, C5H4O2, of which two varietiesare known, a and g. g-pyrone is the parent substance of severalnatural yellow dyestuffs. Source: adambom
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pyrone
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