| abstract |
Compound represented by Formula (I) or a salt thereof, wherein R1 are the same or different, and each represents C1-C6 alkyl; X1 and X2 independently represent N or CH; Y is a group represented by Formula (A) in which the divalent moiety represented by is a C3-C10 heterocycloalkylene group containing nitrogen, a group represented by Formula (B) in which the divalent moiety represented by is a group C3-C10 cycloalkylene, or a group represented by Formula (C) in which the divalent moiety represented by is a C6-C12 arylene group; R2 is hydrogen, C2-C6 alkynyl, -C (> = O) ORx, -C (> = O) N (Rx) (Ry), hydroxy-C1-C6 alkyl, di (C1-C6 alkyl) amino-alkyl C1-C6, or C2-C9 heteroaryl optionally having R3; and R3 is C1-C6 alkyl or di (C1-C6 alkyl) amino-C1-C6 alkyl. |