US 7,524,876 B2
Luciferin derivatives
Hideo Takakura, Aichi (Japan); Yasuteru Urano, Kanagawa (Japan); and Tetsuo Nagano, Tokyo (Japan)
Assigned to The University of Tokyo, Tokyo (Japan)
Filed on Jul. 27, 2006, as Appl. No. 11/493,815.
Claims priority of application No. P2005-286948 (JP), filed on Sep. 30, 2005.
Prior Publication US 2007/0155806 A1, Jul. 05, 2007
Int. Cl. A61K 31/428 (2006.01); C07D 277/62 (2006.01); C07D 417/04 (2006.01)
U.S. Cl. 514—367  [548/146; 548/152; 548/178; 514/365] 5 Claims
 
1. A compound represented by the following general formula (I) or a salt thereof:

OG Complex Work Unit Drawing
[wherein R1 and R2 independently represent hydrogen atom, a C1-6 alkyl group which may be substituted, or a group represented by the following formula (A):

OG Complex Work Unit Drawing
[wherein X1 and X2 independently represent hydrogen atom, or a group represented as —N(R3)(R4) (wherein R3 and R4 independently represent hydrogen atom, a C1-6 alkyl group which may be substituted, a C1-6 alkylcarbonyl group which may be substituted, or a C1-6 alkyloxycarbonyl group which may be substituted); and n represents an integer of 1 to 6], provided that R1 and R2 do not simultaneously represent hydrogen atom].