| 主权项 |
1. A detergent or cleaning agent, comprising a compound of the general formula (I), where R1, R2, R3, and R4 independently of one another stand for hydrogen, an alkyl group having 1 to 20 C atoms, (CH2)nOR5, (CH2)nCOOR6, (CH2)nCONR7R8, or SO3H, R5, R6, R7, and R8 independently of one another stand for hydrogen or an alkyl group having 1 to 20 C atoms, and n stands for a number from 0 to 6, whereby the chains of the alkyl groups can also be interrupted optionally by heteroatoms such as O, N, or S, and/or the alkyl groups optionally can also hydroxy- and/or amino-substituted. |
