Study to Determine Optimal Dose, Evaluate the Efficacy and Safety of PRG-N-01 in Patients With Neurofibromatosis Type II

The goal of this clinical trial is to learn if Trineumin(Code name:PRG-N-01) works to treat Neurofibromatosis Type II(NF2) in adults. It will also learn about the safety and tolerability and toxicity of PRG-N-01. The main questions it aims to answer are: * What dose was determined as the Maximum Tolerated Dose (MTD) of Trineumin? * What dose was explored as the optimal effective dose of Trineumin based on radiographic response? * Does Trineumin reduce tumor size or improve participants' quality of life, including hearing function? * What medical problems do participants have when taking Trineumin? Participants will: * Take Trineumin every day for 96 weeks * Visit the clinic once 1, 4, 8, 12, 18week and every 12 weeks and for checkups and tests