單項選擇題

2005版《中國藥典》規(guī)定:馬錢子粉含士的寧(C21H22N2O2)。應為()。

A.0.78%~0.82%
B.0.75%~0.80%
C.0.70%~0.82%
D.0.80%~0.82%
E.0.70%~0.80%

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