The invention provides a compound having the structure (I), wherein A is a substituted or unsubstituted ring; Z is present or absent and when present is (II), wherein n is 0, 1, 2, 3, or 4; Y is -(CR11R12)-, -NH(CR11R12)- or -O(CR11R12)- wherein R11 and R12 are each hydrogen or combine to form a carbonyl; and wherein R1 to R10 are herein as described.
本发明提供了一种具有结构(I)的化合物,其中A是取代的或未取代的环;Z是否存在,如果存在则为(II),其中n为0,1,2,3或4;Y是-(CR11R12)-,-NH(CR11R12)-或-O(CR11R12)-,其中R11和R12分别是
氢或结合形成一个羰基;以及其中R1至R10如本文所述。