In this task, you are given a set of context paragraphs, some supporting facts and an answer of a question. Your task is to generate question for given answer based on set of context paragraphs, supporting facts and an answer.
Q: Context_1 : Porphin, sometimes spelled porphine, is the parent chemical compound for types of biochemically significant compounds called porphyrins. The chemical formula of porphin is CHN. Porphin is an organic compound that is aromatic and heterocyclic since its chemical structure, shown at right, essentially consists of four pyrrole rings joined together by four methine (=CH) groups to form a larger macrocycle ring. The compound itself is a solid. Context_2 : Cyclopropanol is an organic compound with the chemical formula CHO. It contains a cyclopropyl group with a hydroxyl group attached to it. The compound is highly unstable due to the three-membered ring, and is susceptible to reactions that open the ring. It is highly prone to rearrangement, undergoing structural isomerization to form propanal. This property is useful synthetically: cyclopropanol can be used as a synthon for the homoenolate of propanal. The chemical is also useful as a reagent to introduce a cyclopropyl group into ester, sulfate, and amine linkages. The resulting cyclopropyl-containing compounds have been used in investigations of potential antiviral drugs and of modulators of protein trafficking. Context_3 : The Schumacher Nitro 21 XT-R 3E is a radio-controlled car made by Schumacher Racing Products powered by a nitro fuel engine. Context_4 : Nitromethane is an organic compound with the chemical formula CH3NO2 . It is the simplest organic nitro compound. It is a polar liquid commonly used as a solvent in a variety of industrial applications such as in extractions, as a reaction medium, and as a cleaning solvent. As an intermediate in organic synthesis, it is used widely in the manufacture of pharmaceuticals, pesticides, explosives, fibers, and coatings. Nitromethane is used as a fuel in various motorsports and hobbies, e.g. Top Fuel drag racing and miniature internal combustion engines in radio control, control line and free flight model aircraft. Context_5 : Propargyl bromide, also known as 3-bromo-1-propyne, is an organic compound with the chemical formula CHCCHBr. It is a halogenated organic compound consisting of propyne with a bromine substituent on the methyl group. It has a lachrymatory effect, like related compounds. The compound is a useful reagent in organic synthesis. Context_6 : Methyl vinyl ether is an organic compound with the chemical formula CHO. It is the simplest chemical that contains both an alkene group and an alkyl group with an ether linkage. The compound can be made by reaction of acetylene and methanol in presence of a base. Context_7 : "N"-Methylaniline (NMA) is an aniline derivative. It is an organic compound with the chemical formula CHNH(CH). The substance exists as a colorless or slightly yellow viscous liquid and turns brown when exposed to air. The chemical is insoluble in water. It is used as a latent and coupling solvent and is also used as an intermediate for dyes, agrochemicals and other organic products manufacturing. NMA is toxic and exposure can cause damage to the central nervous system and can also cause liver and kidney failure. Context_8 : 4-Nitroaniline, p-nitroaniline or 1-amino-4-nitrobenzene is an organic compound with the formula CHNO. It is an organic chemical compound, consisting of a benzene ring in which an amino group is para to a nitro group. This chemical is commonly used as an intermediate in the synthesis of dyes, antioxidants, pharmaceuticals, and gasoline, in gum inhibitors, poultry medicines, and as a corrosion inhibitor. Context_9 : Norbornane (also known as bicyclo[2.2.1]heptane) is an organic compound and a saturated hydrocarbon with chemical formula CH. It is a crystalline compound with melting point 88 C. The carbon skeleton is derived from cyclohexane ring with a methylene bridge in the 1,4- position, and is a bridged bicyclic compound. The compound is a prototype of a class of strained bicyclic hydrocarbons. Context_10 : Cacotheline is an organic compound with the chemical formula CHNO. It is a nitro derivative of brucine obtained by reaction of brucine with nitric acid. It is used as an indicator in the titrimetric analysis of tin ions (Sn). fact_1 : The Schumacher Nitro 21 XT-R 3E is a radio-controlled car made by Schumacher Racing Products powered by a nitro fuel engine. fact_2 : Nitromethane is an organic compound with the chemical formula CH3NO2 . Answer: Nitromethane
A:
The Schumacher Nitro 21 XTR 3E is powered by what organic compound with the chemical formula CH3NO2?