What is described is a compound of formula I
consisting of a compound in which
R
1
is a branched chain alkyl consisting of 10 to 31 carbons;
R
2
is a linear alkyl, alkenyl, or alkynyl consisting of 2 to 20 carbons, or a branched chain alkyl consisting of 10 to 31 carbons;
L
1
and L
2
are the same or different, each a linear alkane of 1 to 20 carbons or a linear alkene of 2 to 20 carbons;
X
1
is S or O;
R
3
is a linear or branched alkylene consisting of 1 to 6 carbons; and
R
4
and R
5
are the same or different, each a hydrogen or a linear or branched alkyl consisting of 1 to 6 carbons; or
a pharmaceutically acceptable salt thereof.
描述的是一种化合物,其
化学式为I,包括以下成分:
R1为由10至31个碳组成的支链烷基;
R2为由2至20个碳组成的直链烷基、烯烃或
炔烃,或者由10至31个碳组成的支链烷基;
L1和
L2相同或不同,每个为由1至20个碳组成的直链
烷烃或由2至20个碳组成的直链烯烃;
X1为S或O;
R3为由1至6个碳组成的直链或支链烷基;以及
R4和R5相同或不同,每个为氢或由1至6个碳组成的直链或支链烷基;或其药用可接受盐。