2,4-Pentadienoic acid,5-phenyl-,(2S,3aR,3bS,3cS,4aR,5S,5aS,8aR,8bR,9R,10R,10aS)-3a,3b,3c,4a,5,5a,8a,9,10,10a-decahydro-5,5a-dihydroxy-4a-(hydroxymethyl)-7,9-dimethyl-10a-(1-methylethenyl)-6-oxo-2-phenyl-6H-2,8b-epoxyoxireno[6,7]azuleno[5,4-e]-1,3-benzodioxol-10-ylester, (2E,4E)- cas no:34807-41-5

Name2,4-Pentadienoic acid,5-phenyl-,(2S,3aR,3bS,3cS,4aR,5S,5aS,8aR,8bR,9R,10R,10aS)-3a,3b,3c,4a,5,5a,8a,9,10,10a-decahydro-5,5a-dihydroxy-4a-(hydroxymethyl)-7,9-dimethyl-10a-(1-methylethenyl)-6-oxo-2-phenyl-6H-2,8b-epoxyoxireno[6,7]azuleno[5,4-e]-1,3-benzodioxol-10-ylester, (2E,4E)-
CAS34807-41-5
SynonymsDaphnetoxin,12-[(1-oxo-5-phenyl-2,4-pentadienyl)oxy]-, [12b(2E,4E)]-; 2,4-Pentadienoic acid, 5-phenyl-,3a,3b,3c,4a,5,5a,8a,9,10,10a-decahydro-5,5a-dihydroxy-4a-(hydroxymethyl)-7,9-dimethyl-10a-(1-methylethenyl)-6-oxo-2-phenyl-6H-2,8b-epoxyoxireno[6,7]azuleno[5,4-e]-1,3-benzodioxol-10-ylester, [2S-[2a,3ab,3bb,3cb,4ab,5b,5ab,8aa,8ba,9a,10b(2E,4E),10ab]]-; Meserein; Mezerein;Mezereine; NSC 239072
Molecular FormulaC38H38 O10
Molecular Weight654.70232

AppearanceWhite solid
refractive index1.68
storage temp−20°C

Hazardclass6.1(b)

Hazard Xi: Irritant;
Risk R36/37/38
Safety

Questionable carcinogen with experimental neoplastigenic data. Mutation data reported. When heated to decomposition it emits acrid smoke and irritating fumes.
Safety Information of Mezerein (CAS NO.34807-41-5):
Hazard Codes: Xi
Risk Statements: 38 
38:  Irritating to the skin
Safety Statements: 22-24/25
22:  Do not breathe dust  
24:  Avoid contact with skin 
25:  Avoid contact with eyes

1.		mrc-smc 20 mg/L		NATUAS    Nature. 294 (1981),263.
2.		otr-mus:fbr 100 µg/L		FACOEB    Food Additives and Contaminants. 1 (1984),179.
3.		otr-mus:oth 16 nmol/L		CRNGDP    Carcinogenesis. 4 (1983),1507.
4.		dns-mus-skn 340 nmol/kg		CNREA8    Cancer Research. 43 (1983),4126.