What is described is a compound of formula I
wherein
X is an alkylene or an alkenylene;
Y is a monocyclic, bicyclic, or tricyclic arene or heteroarene;
Z is S or O;
L is a linear or branched alkylene of 1 to 6 carbons;
R1 is a branched alkyl or alkenyl of 1 to 25 carbons;
R2 is a alkyl or alkenyl of 1 to 20 carbons;
R3 and R4 are independently a linear or branched alkyl of 1 to 6 carbons;
n is 0 to 6; and
m, p, q, and r are independently 1-18;
or a pharmaceutically acceptable salt thereof.
所述的是式 I 的化合物
式中
X 是亚烷基或烯基;
Y 是单环、双环或
三环芳烃或杂
芳烃;
Z 是 S 或 O;
L 是 1 至 6 个碳原子的直链或支链烯烃;
R1 是碳原子数为 1 至 25 的支链烷基或烯基;
R2 是碳原子数为 1 至 20 的烷基或烯基;
R3 和 R4 独立地是 1 至 6 个碳原子的直链或支链烷基;
n 为 0 至 6;以及
m、p、q 和 r 独立地为 1-18;
或其药学上可接受的盐。