| 摘要 |
A compound, or a protonate or salt thereof, having a formula I of: wherein Y represents an optionally substituted aromatic group; n is 1 or 2; a is 0 to 4; R1 and R2 are each independently H; optionally substituted alkyl; optionally substituted aralkyl; acyl; phosphonyl; -S02R12; -C(0)R13; -C(0)OR14; -C(0)NR15R16; -C(0)CH2R17; or - C(S)-NR18R19; -S(0)R20; or -S02NR21R22, wherein R12-R22 are each independently H, optionally substituted alkyl, optionally substituted aralkyl, optionally substituted aryl, or - C(0)R23, wherein R23 is H, optionally substituted alkyl, optionally substituted aralkyl, or optionally substituted aryl; and each R3 is independently optionally substituted alkyl, halogen, optionally substituted alkoxy, optionally substituted carboxyl, amide; amino; or nitro. |
