| (210) | Number of the EPO application | 20722197 |
| (220) | Filing date of the EPO application | 2020.04.10 |
| (80) | EPO patent specification publication (B) | EPB nr. 37/2023, 2023.09.13 |
| (110) | EPO patent number | 3958977 |
| (21) | Number of the application | e 2022 0235 |
| (71) | Name(s) of applicant(s), code of the country | ImmunoGen, Inc., US; |
| (72) | Name(s) of inventor(s), code of the country | CHARI Ravi, US;
WIDDISON Wayne C., US;
LI Wei, US;
PLEYNET David P., US; |
| (73) | Name(s) of owner(s), code of the country | ImmunoGen, Inc., US; |
| (54) | Title of the invention | CAMPTOTHECIN DERIVATIVES |
| (13) | Kind-of-document code | A1 |
| (51) | International Patent Classification | A61P 35/00 (2006.01.01); C07D 491/22 (2006.01.01); A61K 31/4375 (2006.01.01); A61K 47/50 (2017.01.01) |
| (19) | Country | US |
| (41) | Date of publication of the application | 2022.03.31 |
| (30) | Priority | 201962839440 P, 2019.04.26, US; 201962875169 P, 2019.07.17, US; 202062978159 P, 2020.02.18, US |
| (86) | International application | PCT/US2020/027831, 2020.04.10 |
| (87) | International publication | WO 2020/219287, 2020.10.29 |