CC(O)[C@H](NC(=O)C1CCN(C(=O)[C@H](Cc2ccccc2)NC(=O)OC(C)(C)C)CC1)C(=O)O
Orally active drug usually follows the rule of three, in which the molecular weight of a fragment is <300, the c Log P is ≤3, the number of hydrogen bond donors is ≤3 and the number of hydrogen bond acceptors is ≤3. The molecule meets rule of three or not?