![2,6-Diazaspiro[3.4]octan-5-one hydrochloride](data:image/png;base64,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)
| 4H48-5-DD | |
| % | |
| 1203683-28-6 | |
| MFCD11053741 | |
| C6H11ClN2O | |
| 162.62 |
| Units | Price (USD) | Availability |
|---|
PN: 4H48-5-DD
CAS: 1203683-28-6
Molecule Weight: 162.62
Formula: C6H11ClN2O
PN: 4H48-5-FZ
CAS: 1361115-18-5
Molecule Weight: 164.63
Formula: C6H13ClN2O
![2,7-Diazaspiro[4.4]nonan-1-one hydrochloride](data:image/png;base64,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)
PN: 4H48-5-DT
CAS: 1203682-17-0
Molecule Weight: 176.64
Formula: C7H13ClN2O
![2,6-Diazaspiro[3.4]octan-7-one](data:image/png;base64,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)
PN: 4H48-1-00A
CAS: 1211515-65-9
Molecule Weight: 126.159
Formula: C6H10N2O
PN: 4H48-5-G0
CAS: 1211573-00-0
Molecule Weight: 178.66
Formula: C7H15ClN2O
PN: 4H48-5-R1
CAS: 1273577-42-6
Molecule Weight: 150.61
Formula: C5H11ClN2O
PN: 4H48-5-72
CAS: 644972-57-6
Molecule Weight: 150.61
Formula: C5H11ClN2O
PN: 4H48-5-S9
CAS: 1279048-81-5
Molecule Weight: 150.61
Formula: C5H11ClN2O
TSCA: Not listed on TSCA inventory