LOS ANGELES - Shareholders in a company claim in a June 18 filing in California federal court that their derivative amended complaint sufficiently pleads that presuit demand on the company's board of directors would have been futile (CAMOFI Master LDC, et al. v. Jerrold Pressman, et al., No. 11-cv-04574, C.D. Calif.). Subscribers may view the brief in opposition to motion to dismiss available within the full article.