Methods for the preparation of...

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Phosphorus containing other than solely as part of an...

Reexamination Certificate

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C540S542000

Reexamination Certificate

active

07345032

ABSTRACT:
The present invention provides methods for the preparation of {2-[(8,9)-dioxo-2,6-diaza-bicyclo[5.2.0]-non-1(7)-en-2-yl]ethyl}phosphonic acid, and esters thereof.

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