| 摘要 |
[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)] The 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).
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