Patients will undergo a 2-week screening period and a 4-week core treatment period, and eligible patients who complete the core treatment period will receive a cycle of extended treatment (once weekly for 4 weeks) until disease progression or toxicity intolerance.

Patients in Cohort 1 will receive 4 escalating doses (2, 5, 10 and 25 μg) of M701 on Days 1, 8, 15 and 22. The maintenance dose during extended treatment period is 25 μg.

Cohort 1 of M701

Patients in Cohort 2 will receive a starting dose on Day 1 and three infusions at a higher maintenance dose level on Days 8, 15 and 22. The starting dose is 25 μg, and the maintenance dose during core treatment period and extended treatment period is 50 μg.

Cohort 2 of M701

Patients in Cohort 3 will receive a starting dose on Day 1 and three infusions at a higher maintenance dose level on Days 8, 15 and 22. The starting dose is 50 μg, and the maintenance dose during core treatment period and extended treatment period is 100 μg.

Cohort 3 of M701

Patients in Cohort 4 will receive a starting dose on Day 1 and three infusions at a higher maintenance dose level on Days 8, 15 and 22. The starting dose is 100 μg, and the maintenance dose during core treatment period and extended treatment period is 200 μg.

Cohort 4 of M701

Patients in Cohort 5 will receive a starting dose on Day 1 and three infusions at a higher maintenance dose level on Days 8, 15 and 22. The starting dose is 150 μg, and the maintenance dose during core treatment period and extended treatment period is 300 μg.

Cohort 5 of M701

Patients in Cohort 6 will receive a starting dose on Day 1 and three infusions at a higher maintenance dose level on Days 8, 15 and 22. The starting dose is 200 μg, and the maintenance dose during core treatment period and extended treatment period is 400 μg.

Cohort 6 of M701

Patients in Cohort 7 will receive a starting doseon Day 1 and three infusions at a higher maintenance dose level on Days 8, 15 and 22. The starting dose is 250 μg, and the maintenance dose during core treatment period and extended treatment period is 500 μg.

M701의 1번 코호트, M701의 2번 코호트, M701의 3번 코호트, M701의 4번 코호트, M701의 5번 코호트, M701의 6번 코호트, M701의 7번 코호트