申请人:OREGON STATE
公开号:WO2014116578A1
公开(公告)日:2014-07-31
A compound, or a protonate or salt thereof, having the formula (I); wherein R1 is an optionally substituted aromatic group; n is 1 or 2; each R2 is independently selected from an optionally substituted alkyl, halogen, optionally substituted alkoxy, optionally substituted carboxyl, or amide; a is 0 to 4; R3 is H or an optionally substituted alkyl; each R4 and R5 is independently selected from H, optionally substituted alkyl, acyl, optionally substituted aralkyl, optionally substituted aryl, or -C(O)R8; and R8 is H, alkyl, aralkyl or aryl.