(US20200318243) 1: A compound of formula (I) or a salt thereof, a solvate thereof, a tautomer thereof, a stereoisomer thereof, or a mixture thereof; wherein: R1 is selected from the group consisting of an optionally substituted alkoxy, an optionally substituted aryloxy, an optionally substituted amino, and an optionally substituted amide; each R2 is independently selected from the group consisting of a hydrogen, an optionally substituted alkyl, an optionally substituted cycloalkyl, an optionally substituted arylalkyl, and an optionally substituted aryl; each R3 is independently selected from the group consisting of a hydrogen, an optionally substituted alkoxy, an optionally substituted aryloxy, an optionally substituted amino, an optionally substituted amide, an optionally substituted alkyl, an optionally substituted cycloalkyl, an optionally substituted arylalkyl, and an optionally substituted aryl; X is O or S; and Y is O or S. 2: The compound of formula (I) of claim 1, wherein R1 is —NH2, a (C1-6)alkylamino, or a di(C1-6)alkylamino. 3: The compound of formula (I) of claim 1, wherein R1 is selected from the group consisting of —NH2, —NHCH3, —NHC2H5, —N(CH3)2, —N(CH3)C2H5, —N(C2H5)2, pyrrolidinyl, piperidinyl, 4-methylpiperidinyl, morpholinyl, piperazinyl, and (N-methyl)piperazinyl. 4: The compound of formula (I) of claim 3, wherein R1 is —N(CH3)2. 5: The compound of formula (I) of claim 1, wherein each R2 is a hydrogen. 6: The compound of formula (I) of claim 1, wherein each R3 is a hydrogen. 7: The compound of formula (I) of claim 1, wherein X is S. 8: The compound of formula (I) of claim 1, wherein Y is S. 9: The compound of formula (I) of claim 1, which is 10: A method of inhibiting corrosion of a metallic substrate in contact with a corrosive medium, the method comprising: introducing the compound of formula (I) of claim 1 into the corrosive medium in contact with the metallic substrate. 11: The method of claim 10, wherein the compound of formula (I) is 12: The method of claim 10, wherein the metallic substrate comprises steel. 13: The method of claim 10, wherein the metallic substrate comprises carbon steel. 14: The method of claim 10, wherein the corrosive medium comprises at least one inorganic acid, at least one inorganic salt, or both. 15: The method of claim 14, wherein the corrosive medium comprises CO2, brine, or both. 16: The method of claim 10, wherein the corrosive medium has a pH of 5 or below. 17: The method of claim 10, wherein the compound of formula (I) is introduced into the corrosive medium at a concentration of 0.1-200 ppm. 18: The method of claim 10, which has a corrosion inhibition efficiency in a range of 85-98%. 19: The method of claim 10, wherein the compound of formula (I) imparts a corrosion rate in a range of 0.8-2.5 mils penetration per year (mpy) to the metallic substrate. 20: The method of claim 10, wherein the metallic substrate is part of a system for oil or gas production, transportation, or refining.
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