Molar concentration of drug compound...?

Need someone to check my math: molecular weight of compound 602.58. Need to make 200uM at 2.0uL.?

So, 100uM at 4uL = 0.4 nmol. I want to make 0.4 nmol with 200 uM at 2.0 uL. Given molecular weight, I came to 0.121mg/mL. Does this sound correct?
Answer:
It is correct.

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