Patent ID: 8415477
Filing Date: 2013-04-09
Classification: C07D,C09B,G01N

Abstract:
1. A compound according to the formula: wherein X is carbon; Y is nitrogen; Z is sulfur or oxygen; R R R R R R R R R R a member selected from together with the atoms to which they are joined, form a ring which is a 5-, 6- or 7-membered cycloalkyl, a substituted 5-, 6- or 7-membered cycloalkyl, a 5-, 6- or 7-membered heterocycloalkyl, a substituted 5-, 6- or 7-membered heterocycloalkyl, a 5-, 6- or 7-membered aryl, a substituted 5-, 6- or 7-membered aryl, a 5-, 6- or 7-membered heteroaryl, or a substituted 5-, 6- or 7-membered heteroaryl; and wherein at least two of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 or R 9 comprises a sulfo group.