申请人:University of Oregon
公开号:US20150355153A1
公开(公告)日:2015-12-10
A compound, or a protonate or salt thereof, having the formula of:
wherein R
1
is an optionally substituted aromatic group;
n is 1 or 2;
each R
2
is independently selected from an optionally substituted alkyl, halogen, optionally substituted alkoxy, optionally substituted carboxyl, or amide;
a is 0 to 4;
R
3
is H or an optionally substituted alkyl;
each R
4
and R
5
is independently selected from H, optionally substituted alkyl, acyl, optionally substituted aralkyl, optionally substituted aryl, or —C(O)R
8
; and
R
8
is H, alkyl, aralkyl or aryl.