| abstract |
[wherein R 1a , R 1b , R 1c , and R 1d may be the same or different and each represent a hydrogen atom, lower alkyl, —(CH 2 ) p —X (wherein p represents an integer of 1 to 6, X represents hydroxy, lower alkoxy, or —NR 2a R 2b ), or —CH[(CH 2 ) n OH] 2 (wherein n represents an integer of 1 to 5)]nThe present invention provides an aqueous solution having a pH of 3.5 or less and containing a pyrazoloacrydone derivative or a pharmaceutically acceptable salt thereof represented by, for example, above general formula (I). |