Theophylline-based nitophenylpiperazine derivatives for enhancing aortic smooth muscle relaxation

摘要

A substance for enhancing an aortic smooth muscle relaxation is provided. The substance is one selected from the group consisting of a compound of formula (I), a pharmaceutical acceptable therefrom and a solvate therefrom, wherein either of R1 and R2 is one of a hydrogen and a nitro group.