# Schedules of Controlled Substances: Extension of Temporary Placement of cyclopentyl fentanyl, isobutyryl fentanyl, para-chloroisobutyryl fentanyl, para-methoxybutyryl fentanyl, and valeryl fentanyl in Schedule I of the Controlled Substances Act
> **Rule** · Temporary rule; temporary scheduling order; extension. · Published 2020-01-30 · 85 FR 5321
## Document
- **Document number:** 2020-01683
- **Category:** scheduling
- **Type:** Rule
- **Action:** Temporary rule; temporary scheduling order; extension.
- **Citation:** 85 FR 5321
- **Publication date:** 2020-01-30
## Abstract

The Acting Administrator of the Drug Enforcement Administration is issuing this temporary scheduling order to extend the temporary schedule I status of cyclopentyl fentanyl (N-(1- phenethylpiperidin-4-yl)-N-phenylcyclopentanecarboxamide), isobutyryl fentanyl (N-(1-phenethylpiperidin-4-yl)-N-phenylisobutyramide), para- chloroisobutyryl fentanyl (N-(4-chlorophenyl)-N-(1-phenethylpiperidin- 4-yl)isobutyramide), para-methoxybutyryl fentanyl (N-(4-methoxyphenyl)- N-(1-phenethylpiperidin-4-yl)butyramide), and valeryl fentanyl (N-(1- phenethylpiperidin-4-yl)-N-phenylpentanamide) including their isomers, esters, ethers, salts, and salts of isomers, esters and ethers. The schedule I status of cyclopentyl fentanyl, isobutyryl fentanyl, para- chloroisobutyryl fentanyl, para-methoxybutyryl fentanyl, and valeryl fentanyl currently is in effect until February 1, 2020. This temporary order will extend the temporary scheduling of cyclopentyl fentanyl, isobutyryl fentanyl, para-chloroisobutyryl fentanyl, para- methoxybutyryl fentanyl, and valeryl fentanyl for one year, or until the permanent scheduling action for these substances is completed, whichever occurs first.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/01/30/2020-01683/schedules-of-controlled-substances-extension-of-temporary-placement-of-cyclopentyl-fentanyl)
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