The invention relates to tetrahydrofuran derivatives of general formula (I), wherein X stands for *—(C═O)—O—, *—(CH2)n-O—, or *—(CH2)n-O—(C═O)—, wherein * represents the point of bonding to the tetrahydrofuran ring and n has the value 0, 1, or 2; and R1 and R2 are selected independently of each other from among C4-C5 alkyl and C5-C6 cycloalkyl, wherein the cycloalkyl groups are unsubstituted or can be substituted by at least one C1-C10 alkyl group, a plasticizer composition that contains said tetrahydrofuran derivatives, molding masses that contain a thermoplastic polymer or an elastomer and such a tetrahydrofuran derivative. The invention further relates to a method for producing said tetrahydrofuran derivatives, and to the use of said tetrahydrofuran derivatives