Heidelberg Pharma AG, a clinical-stage biotech company developing innovative Antibody Drug Conjugates (ADCs), today announced that its partner Huadong Medicine Co., Ltd., Hangzhou, China, (SZ 000963; Huadong) has reached a development milestone under the terms of the license agreement from February 2022. With the dosing of the first patient in a clinical study with HDP-101 (INN: pamlectabart tismanitin) in China, a planned milestone payment to Heidelberg Pharma became due and is being processed. Financial details were not disclosed.