exhibit 10. 50 sellas life sciences group, inc. times square tower 7 times square, suite 2503 new york, new york 10036 january 19, 2021 mh2 technology law group llp timothy b. donaldson patent attorney 1951 kidwell drive, suite 310 tysons corner, va 22182 703 # # # - # # # - # # # # ( p ) 703 # # # - # # # - # # # # ( f ) tdonaldson @ mh2law. com www. mh2law. com attachment a patent rights attachment b improvement patents attachment c fda submissions and correspondence