para-Methoxybutyryl fentanyl (N-(4-methoxyphenyl)-N-(1-phenethylpiperidin-4-yl)butyramide)

For para-Methoxybutyryl fentanyl (N-(4-methoxyphenyl)-N-(1-phenethylpiperidin-4-yl)butyramide), schedule is Schedule I; listed under is Opiates; dea code number is 9837; cfr citation is 21 CFR 1308.11(b)(97), recorded from its source on 2026-09-01.

Values marked our reading are our classification of what the source says — the source does not print them in those words. The quote below is the evidence for each one; judge it yourself.

What the source says

(97) para-Methoxybutyryl fentanyl (N-(4-methoxyphenyl)-N-(1-phenethylpiperidin-4-yl)butyramide) | 9837 |

— ecfr.gov, retrieved 2026-09-01

Where each value comes from

This source states these in separate places, so each value is shown with the passage that states it.

— all from ecfr.gov, retrieved 2026-09-01

Source

• ecfr.govhttps://www.ecfr.gov/current/title-21/chapter-II/part-1308

Last verified against source: 2026-09-01. Due for re-check by 2026-12-30. This page as Markdown · OKF bundle · full dataset as JSON.