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| piperic acid (CH₂O₂: C₆H₃C₅H₅O₂) | |||
| piperinic acid | |||
| piperic acid | |||
| heliotropic acid; 3,4-methylene dioxy benzoic acid | |||
| 胡椒酸: 12 phrases in 4 subjects |
| Chemistry | 1 |
| General | 3 |
| Perfume | 7 |
| Pharmacology | 1 |
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