The present invention relates to a compound for reducing forces of molecular attraction that are present in heavy and extra-heavy hydrocarbons of problematic fluidity, the objective of which is to improve flow conditions while reducing counterpressures in transportation thereof via pipeline. The formula of the compound that is the subject of the present invention may include in a proportion of up to 50% fossil-origin organic compounds such as middle fractions of petroleum and aliphatic hydrocarbons, combined in a proportion of up to 50% non-fossil-origin organic compounds such as methyl esters of vegetable- or animal-oil fatty acids. The present invention, furthermore, promotes environmental and economic sustainability, which is consistent with policies worldwide to reduce CO2 emissions, the aforesaid being due to the fact that the non-fossil fraction present in the fluidity enhancer, once dispensed into the heavy and extra-heavy petroleum, forms part of the diesel fraction that will be obtained in the course of the refining process thereof.
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