Manuso has said in the past that if they choose to offer it out for partnership they are obligated to include EIASI in the list of companies receiving the proposal.
EISAI is not obligated to bid and ASTX is not obligated to accept an EISAI bid.
I could be wrong on this, but my understanding is if ASTX accepts a bid from some other company, EISAI does not have a right to match that bid.