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Table 2.
Predicted and observed abundances of the C3H4O2 isomers.
| Isomer | Formula | Predicted abundance | Predicted abundance | Observed abundance |
|---|---|---|---|---|
| (/H) | (/CH3OH) | (/CH3OH) | ||
| 3-Hydroxypropenal | HOCHCHCHO | 1.4 × 10−8 | 4.6 × 10−4 | 1.0 × 10−4 |
| Propanedial | HCOCH2CHO | 3.0 × 10−9 | 9.9 × 10−5 | |
| Methyl glyoxal | CH3COCHO | 7.4 × 10−8 | 2.4 × 10−3 | |
| 2-Hydroxypropenal | CH2COHCHO | 2.0 × 10−8 | 6.6 × 10−4 | |
| Vinyl formate | C2H3OCHO | 8.4 × 10−10 | 2.8 × 10−5 | ≤ 4 × 10−4 |
| 2-Propenoic acid | C2H3COOH | 2.2 × 10−13 | 7.3 × 10−9 | ≤ 5 × 10−4 |
Notes. The total uncertainty on the predicted abundances is about a factor 10.
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