There is provided a compound of Formula I
wherein R3, R4, R5, R6 and R7 are independently selected from H and —Y—R8; wherein each R8 is independently selected from —OH, hydrocarbyl groups, oxyhydrocarbyl groups, cyano (—CN), nitro (—NO2), H-bond acceptors, and halogens; wherein at least one of R3, R4, R5, R6 and R7 is —Y—R8 wherein R8 is selected from substituted and unsubstituted heterocyclic rings and amino substituted phenyl groups, wherein X is a bond or a linker group; wherein Y is an optional linker group; and wherein ring A is optionally further substituted; wherein R9 is selected from H, —OH and —OSO2NR1R2; wherein R1 and R2 are independently selected from H and hydrocarbyl; wherein (a) X is a bond and at least one of R3, R4, R5, R6 and R7 is —Y—R8; OR (b) R9 is —OSO2NR1R2 or —OH and four of R3, R4, R5, R6 and R7 are H and one of R3, R4, R5, R6 and R7 is —Y—R8.
提供了一个化合物I的公式,其中R3、R4、R5、R6和R7分别独立地选自H和—Y—R8;其中每个R8独立地选自—OH、烃基、氧烃基、
氰基(—CN)、硝基(—
NO2)、H键受体和卤素;其中至少有一个R3、R4、R5、R6和R7是—Y—R8,其中R8选自取代和未取代的杂环环和
氨基取代的苯基,其中X是一个键或一个连接基团;其中Y是一个可选的连接基团;并且环A是可选择地进一步取代的;其中R9选自H、—OH和—OSO2NR1R2;其中R1和R2独立地选自H和烃基;其中(a)X是一个键,至少有一个R3、R4、R5、R6和R7是—Y—R8;或者(b)R9是—OSO2NR1R2或—OH,其中四个R3、R4、R5、R6和R7是H,其中一个R3、R4、R5、R6和R7是—Y—R8。