A compound (including salts thereof) according to Formula I
in which
R
1
is H, methyl or ethyl;
R
2
is H, OH, fluorine, C
1
-C
4
linear or branched alkyl, C
1
-C
6
alkoxy wherein the alkyl group is linear or branched, or a C
3
-C
5
cycloalkyl moiety;
R
3
is H, methoxy, methyl or ethyl;
or R
2
and R
3
together form a bridging moiety —O—CH
2
—O— between the phenyl carbon atoms to which they are connected;
R
4
is OH or methoxy; and
R
5
and R
6
are independently H or methyl;
R
1
, R
2
, R
3
, R
4
, R
5
and R
6
are such that,
(i) when R
2
and R
3
together form a bridging moiety —O—CH
2
—O— between the phenyl carbon atoms to which they are connected, R
1
, R
5
, R
6
are H, and R
4
is OH; and
(ii) when R
4
is OH and R
1
—R
3
are H, at least one of R
5
, R
6
is methyl.
公式I中的化合物(包括其盐),其中R1为H,
甲基或乙基;R2为H,OH,
氟,C1-C4线性或支链烷基,C1-C6烷
氧基,其中烷基是线性或支链的,或C3-C5
环烷基;R3为H,甲
氧基,
甲基或乙基;或R2和R3一起形成桥接基-O-
CH2-O-,位于它们连接的
苯基
碳原子之间;R4为OH或甲
氧基;且R5和R6独立地为H或
甲基;R1,R2,R3,R4,R5和R6的取值使得,(i)当R2和R3一起形成桥接基-O- -O-,位于它们连接的
苯基
碳原子之间时,R1,R5,R6为H,R4为OH;(ii)当R4为OH且R1-R3为H时,至少有一个R5,R6为
甲基。