I'm thinking my last email was unclear.
I assume that someone from the commercial team will send (or has sent) the  extension letter to MDEA, YC, and Clarksdale's commercial reps for their  review.
I assume that the  commercial reps with YC, MDEA, and Clarksdale  will get whatever legal input they want from their own lawyers if they think  it is necessary (may not), but as a courtesy, I sent drafts to the two  lawyers I know about.
Kay

Clarification
I'm thinking my last email was unclear.
I assume that someone from the commercial team will send (or has sent) the extension letter to MDEA, YC, and Clarksdale's commercial reps for their review.
I assume that the commercial reps with YC, MDEA, and Clarksdale will get whatever legal input they want from their own lawyers if they think it is necessary (may not), but as a courtesy, I sent drafts to the two lawyers I know about.
Kay
mdea clarksdale legal drafts lawyers know review assume commercial reps unclear input want sent extension letter necessary courtesy team