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fentanyl precursor 18 DEA Special Surveillance List 9 DEA List I 8 category 1 7 EU Scheduled Precursors 7 INCB Red List 7 table I 7 UK Drug Precursors 7 2C precursor 0 NI 0 added 2026 0 allotrope 0 amphetamine precursor 0 apinaca precursor 0 BAFA 0 cannabinoid precursor 0 catalyst 0 category 1 NI 0 category 2A 0 category 2B 0 category 3 0 cathinone precursor 0 chloroephedrine 0 cocaine reagent 0 DEA List II 0 designer precursor 0 EU Voluntary Monitoring List 2016 0 gas 0 GHB precursor 0 ketamine precursor 0 LSD precursor 0 MDMA precursor 0 metal 0 methaqualone precursor 0 nitazene precursor 0 non scheduled 0 PCP precursor 0 reagent 0 reducing agent 0 solvent 0 table II 0 Voluntary monitoring 0 voluntary monitoring 0

Structure of 1-Benzylpiperidin-4-one

1-Benzylpiperidin-4-one

CAS 3612-20-2

fentanyl precursor DEA Special Surveillance List

Structure of 1-boc-4-AP

1-boc-4-AP

CAS 125541-22-2

fentanyl precursor category 1 table I DEA List I EU Scheduled Precursors INCB Red List

Structure of 1-boc-4-piperidinol

1-boc-4-piperidinol

CAS 109384-19-2

fentanyl precursor DEA Special Surveillance List

Structure of 1-boc-4-piperidone

1-boc-4-piperidone

CAS 79099-07-3

fentanyl precursor category 1 table I DEA List I EU Scheduled Precursors INCB Red List

Structure of 4-Anilino-1-benzylpiperidine

4-Anilino-1-benzylpiperidine

CAS 1155-56-2

fentanyl precursor DEA Special Surveillance List

Structure of 4-Anilino-N-phenethylpiperidine (ANPP)

4-Anilino-N-phenethylpiperidine (ANPP)

CAS 21409-26-7

fentanyl precursor category 1 table I EU Scheduled Precursors INCB Red List UK Drug Precursors

Structure of 4-Carbomethoxy-4-ANPP

4-Carbomethoxy-4-ANPP

CAS 61085-55-0

fentanyl precursor DEA Special Surveillance List

Structure of 4-Piperidinol

4-Piperidinol

CAS 5382-16-1

fentanyl precursor DEA Special Surveillance List

Structure of 4-Piperidone

4-Piperidone

CAS 41661-47-6

fentanyl precursor category 1 table I DEA List I EU Scheduled Precursors INCB Red List

Structure of Benzylfentanyl

Benzylfentanyl

CAS 1477-40-3

fentanyl precursor DEA List I

Structure of Benzylfentanyl

Benzylfentanyl

CAS 1474-02-8

fentanyl precursor DEA List I

Structure of N-Phenethyl-4-piperidone (NPP)

N-Phenethyl-4-piperidone (NPP)

CAS 39742-60-4

fentanyl precursor category 1 table I DEA List I EU Scheduled Precursors INCB Red List

Structure of N-Phenyl-4-piperidinamine (4-AP)

N-Phenyl-4-piperidinamine (4-AP)

CAS 23056-29-3

fentanyl precursor category 1 table I DEA List I EU Scheduled Precursors INCB Red List

Structure of Norcarfentanil

Norcarfentanil

CAS 72996-78-2

fentanyl precursor DEA Special Surveillance List

Structure of Norfentanyl

Norfentanyl

CAS 1609-66-1

fentanyl precursor category 1 table I EU Scheduled Precursors INCB Red List UK Drug Precursors

Structure of Phenethyl bromide

Phenethyl bromide

CAS 103-63-9

fentanyl precursor DEA Special Surveillance List

Structure of Propionyl chloride

Propionyl chloride

CAS 79-03-8

fentanyl precursor DEA List I DEA Special Surveillance List

Structure of para-Methyl boc-4-AP

para-Methyl boc-4-AP

CAS 501673-99-0

fentanyl precursor DEA Special Surveillance List