:Mallotojaponin B
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| ImageFile = Mallotojaponin B.png
| ImageAlt = Chemical structure of mallotojaponin B
| PIN = 1-(3-{[3-Acetyl-2,4-dihydroxy-6-methoxy-5-(3-methylbut-2-en-1-yl)phenyl]methyl}-2,6-dihydroxy-4-methoxy-5-methylphenyl)ethan-1-one
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|Section1={{Chembox Identifiers
| CASNo = 1417701-55-3
| CASNo_Ref = {{Cascite|changed|EPA}}
| PubChem = 71657974
| ChEMBL = 2337124
| ChemSpiderID = 28945549
| SMILES = Cc1c(c(c(c(c1OC)Cc2c(c(c(c(c2OC)CC=C(C)C)O)C(=O)C)O)O)C(=O)C)O
| StdInChI = 1S/C25H30O8/c1-11(2)8-9-15-21(29)19(14(5)27)23(31)17(25(15)33-7)10-16-22(30)18(13(4)26)20(28)12(3)24(16)32-6/h8,28-31H,9-10H2,1-7H3
| StdInChIKey = WVPDRBVWCPPZIR-UHFFFAOYSA-N
}}
|Section2={{Chembox Properties
| Formula = C25H30O8
| MolarMass = 458.50 g/mol
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|Section3={{Chembox Hazards
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Mallotojaponin B is a dimeric phlorogucinol found in Mallotus oppositifolius.
The bioassay-guided fractionation of an ethanol extract of the leaves and inflorescence of M. oppositifolius collected in Madagascar led to the isolation of the two new bioactive dimeric phloroglucinols mallotojaponins B and C, together with mallotophenone. These compounds show antiproliferative and antiplasmodial activities.{{cite journal|doi=10.1021/np300750q|pmid=23286240|title=Antiproliferative and Antiplasmodial Dimeric Phloroglucinols from Mallotus oppositifolius from the Madagascar Dry Forest(1)|year=2013|last1=Harinantenaina|first1=Liva|last2=Bowman|first2=Jessica D.|last3=Brodie|first3=Peggy J.|last4=Slebodnick|first4=Carla|last5=Callmander|first5=Martin W.|last6=Rakotobe|first6=Etienne|last7=Randrianaivo|first7=Richard|last8=Rasamison|first8=Vincent E.|last9=Gorka|first9=Alexander|last10=Roepe|first10=Paul D.|last11=Cassera|first11=Maria B.|last12=Kingston|first12=David G. I.|journal=Journal of Natural Products|volume=76|issue=3|pages=388–93|pmc=3606680}}