It is an object to provide a stabilizer for 8-amino-5-chloro-7-phenylpyrido[3,4-d]pyridazine-1,4(2H,3H)-dione (L-012) or a salt thereof, and the like, which does not give an adverse effect during measurements and can suppress a decrease in measurement sensitivity due to exposure by coexisting with the stabilizer and L-012 or a salt thereof.
The present invention relates to a stabilizer for L-012 or a salt thereof, represented by the general formula [1], a stabilization method for L-012 or a salt thereof, coexisting with the stabilizer and L-012 or a salt thereof, and the like.
wherein, p pieces of M1 each independently represent a hydrogen atom or an alkali metal atom, q pieces of R1 each independently represent a hydroxy group or a sulfonic acid group, m represents 0 or 1, p represents an integer of 1 to 3, q represents an integer of 0 to 4, Y represents a nitrogen atom or a CH group (a methine group), and Z represents an aryl group having a specific structure or a pyrazolyl group having a specific structure.
本发明的目的是提供一种 8-
氨基-5-
氯-7-
苯基
哒嗪并[3,4-d]
哒嗪-1,4(2H,3H)-二
酮(L-012)或其盐等的稳定剂,通过稳定剂与 L-012 或其盐共存,在测量过程中不会产生不良影响,并可抑制因暴露而导致的测量灵敏度下降。
本发明涉及由通式[1]表示的 L-012 或其盐的稳定剂、L-012 或其盐的稳定方法、稳定剂与 L-012 或其盐共存等。
其中,M1 中的 p 个各自独立地代表
氢原子或碱
金属原子,R1 中的 q 个各自独立地代表羟基或
磺酸基,m 代表 0 或 1,p 代表 1 至 3 的整数,q 代表 0 至 4 的整数,Y 代表
氮原子或 CH 基(
甲基),Z 代表具有特定结构的芳基或具有特定结构的
吡唑基。