Budweiser beer brewer Anheuser-Busch has rejected the $46 billion takeover proposal made by rival InBev two weeks ago, saying the suggested deal was financially inadequate.   On June 11th the Belgian-Brazilian brewer InBev, best known for its Stella Artois brand, made an unsolicited, non-binding proposal to acquire all outstanding shares of Anheuser-Busch for $65 per share.