US5697987-A  Fitzpatrick, "Ethanol Market Development Challenges-New Feedstocks and Formulations," Governors' Ethanol Coalition Presentation, Feb. 16, 1995.;  Fitzpatrick, "MTHF: A Important New Development for Reformulated Gasoline." Date Unknown.;  Lucas et al., SAE Tech. Paper Ser. No. 932,675 (Oct. 18, 1993).;  Rudolph et al., Biomass, 16, 33-49 (1988). Month unknown.;  Thomas et al., "Biomass Derived Levulinic Acid Derivatives and Their Use as Liquid Fuel Extenders," Biomass Energy Dev. [Proc. South. Biomass Energy Res. Conf. ], 3rd (Smith, Editor; Plenum, New York; 1986) 333-48 (1985 Meeting date) Month Unknown.;  Wallington et al., Environ. Sci. Technol., 24, 1596-99 (1990). Month unknown.US6309430-B1  English-language abstract of JP 58-174492 from Derwent WPI.;  Examination Report dated Nov. 30, 2000, in South Korean Application No. 98-709062, and English-language translation thereof.;  Fitzpatrick, "Ethanol Market Development Challenges-New Feedstocks and Formulations", Governors' Ethanol Coalition Presentation, Feb. 16, 1995.;  Fitzpatrick, "MTHF: A Important New Development for Reformulated Gasoline" Date Unknown.;  Lucas et al., "Exhaust Emissions and Field Trial Results of a New, Oxygenated, Non-Petroleum-Based, Waste-Derived Gasoline Blending Component: 2-Methyltetrahydrofuran", SAE Technical Paper Series 932675, Oct. 18, 1993.;  Rudolph et al., "NOx, NMHC and CO Emissions From Biomass Derived Gasoline Extenders", Biomass, 16, 33-49 (1988) month unavailable.;  Thomas et al., "Biomass Derived Levulinic Acid Derivatives and Their Use as Liquid Fuel Extenders", Biomass Energy Dev. [Proc, South Biomass Energy Res. Conf.], 3rd, Smith, Editor; Plenum, New York, 1986, 333-48 (1985 Meeting Date) month unknown.;  Wallington et al., "The Atmospheric Reactivity of ~aMethyltetrahydrofuran", Environ, Sco. Technol, 24, 1596-99 (1990) Month Unknown.US6712866-B2  Examination Report dated Nov. 30, 2000, in South Korean Application No. 98-709062, and English-language translation thereof.;  Fitzpatrick, "Ethanol Market Development Challenges-New Feedstocks and Formulations", Governors1 Ethanol Coalition Presentation, Feb. 16, 1995.;  Fitzpatrick, "MTHF: A Important New Development for Reformulated Gasoline.".;  International Preliminary Examination Report dated Jun. 16, 1998, in PCT/US97/07347.;  Lucas et al., "Exhaust Emissions and Field Trial Results of a New, Oxygenated, Non-Petroleum-Based, Waste-Derived Gasoline Blending Component: 2-Methyltetrahydrofuran", SAE Technical Paper Series 932675, Oct. 18, 1993.;  Rudolph et al., "NOx, NMHC and CO Emissions from Biomass Derived Gasoline Extenders", Biomass, 16, 33-49 (1988).;  Thomas et al., "Biomass Derived Levulinic Acid Derivatives and Their Use as Liquid Fuel Extenders", Biomass Energy Dev. [Proc, South Biomass Energy Res. Conf.], 3rd, Smith, Editor; Plenum, New York, 1986, 333-48 (1985 Meeting Date).;  Wallington et al., "The Atmospheric Reactivity of ~a-Methyltetrahydrofuran", Environ, Sco. Technol, 24, 1596-99 (1990).;  Written Opinion dated Feb. 9, 1998, in PCT/US97/07347.