Stemarene
{{Chembox
| ImageFile = Stemarene.svg
| ImageSize = 200px
| IUPACName = 13-Methyl-9,12β-ethano-9β-podocarp-13-ene
| SystematicName = (4aS,6aS,9R,11aR,11bS)-4,4,8,11b-Tetramethyl-1,2,3,4,4a,5,6,6a,9,10,11,11b-dodecahydro-9,11a-methanocyclohepta[a]naphthalene
| OtherNames = (+)-Stemar-13-ene
|Section1={{Chembox Identifiers
| CASNo = 138883-56-4
| CASNo_Ref = {{cascite|correct|}}
| Beilstein = 5334696
| ChEBI = 50069
| KEGG = C18223
| PubChem = 15161496
| ChemSpiderID = 21865699
| SMILES = CC1=CC2CCC3C(CCCC3(C24CCC1C4)C)(C)C
| InChI = 1/C20H32/c1-14-12-16-6-7-17-18(2,3)9-5-10-19(17,4)20(16)11-8-15(14)13-20/h12,15-17H,5-11,13H2,1-4H3/t15-,16+,17+,19+,20-/m1/s1
| InChIKey = MCRAOCBPZAIHJQ-QBYKVAOYBI
| StdInChI = 1S/C20H32/c1-14-12-16-6-7-17-18(2,3)9-5-10-19(17,4)20(16)11-8-15(14)13-20/h12,15-17H,5-11,13H2,1-4H3/t15-,16+,17+,19+,20-/m1/s1
| StdInChIKey = MCRAOCBPZAIHJQ-QBYKVAOYSA-N
}}
|Section2={{Chembox Properties
| C=20 | H=32
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|Section3={{Chembox Hazards
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Stemarene is a diterpene hydrocarbon can be produced biosynthetically through enzyme extracts from rice.{{Cite journal | doi = 10.1006/abbi.1996.0223 | title = Biosynthesis of Cyclic Diterpene Hydrocarbons in Rice Cell Suspensions: Conversion of 9,10-syn-Labda-8(17),13-dienyl Diphosphate to 9β-Pimara-7,15-diene and Stemar-13-ene | year = 1996 | last1 = Mohan | first1 = Ram S. | last2 = Yee | first2 = Nathan K.N. | last3 = Coates | first3 = Robert M. | last4 = Ren | first4 = Yue-Ying | last5 = Stamenkovic | first5 = Predrag | last6 = Mendez | first6 = Irena | last7 = West | first7 = Charles A. | journal = Archives of Biochemistry and Biophysics | volume = 330 | pages = 33–47 | pmid = 8651702 | issue = 1}}