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IARC MONOGRAPHS ON THE EVALUATION OF CARCINOGENIC ...

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Based on BUA (1989) and Agency for Toxic Substances and Disease Registry (1995a)<br />

(1) Naphthalene<br />

(2) Naphthalene 1,2-oxide<br />

(3) 1-Naphthol (α-naphthol)<br />

(4) 1-Naphthyl glucuronide or sulfate<br />

(5) trans-1,2-Dihydro-1,2-dihydroxynaphthalene<br />

(6) trans-1,2-Dihydro-2-hydroxynaphthyl-1-glucuronide<br />

(7) 1,2-Dihydroxynaphthalene<br />

(8) 1,2-Naphthoquinone<br />

(9) 2-Hydroxynaphthyl-1-sulfate or -glucuronide<br />

(10) 2-Naphthol (β-naphthol)<br />

(11) N-Acetyl-S-(1,2-dihydro-1-hydroxy-2-naphthyl)-L-cysteine<br />

(12) N-Acetyl-S-(1-naphthyl)-L-cysteine (1-naphthyl mercapturic acid)<br />

(13) 1,4-Dihydroxynaphthalene<br />

(14) 1,4-Naphthoquinone<br />

GSH = Glutathione<br />

R1 = Sulfate or glucuronate group<br />

= N-acetyl-L-cysteine residue<br />

R2<br />

A,Q = O2- and NADPH2-dependent monooxygenase (e.g., cytochrome<br />

P450-NADP-cytochrome-c-reductase system, microsomal)<br />

B = Spontaneous isomerization<br />

C,E,J = Conjugation reaction with sulfate (sulfotransferase, cytosolic) or<br />

with glucuronic acid (UDP-glucuronyltransferase, microsomal)<br />

D = Epoxide hydrolase, synonym: epoxide hydrase (microsomal)<br />

F,N,P = Chemical dehydration<br />

G = Dihydrodiol-dehydrogenase (cystosolic); 3,5-cyclohexadiene-1,2diol-NADP-oxidoreductase<br />

H = Chemical dehydration<br />

K = Chemical hydrolysis + dehydration<br />

L = Enzymatic reaction with glutathione<br />

M = γ-Glutamyl transferase, peptidase, N-acetylase<br />

NAPHTHALENE 391

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