Chemical Name：

(S)-4-ETHYL-4-HYDROXY-7,8-DIHYDRO-1H-PYRANO[3,4-F]INDOLIZINE-3,6,10(4H)-TRIONE

CAS No.: 110351-94-5

Molecular formula：C13H13NO5

Appearance: light yellow to off-white solid

Purity: 98%min

Description: applied in ADC drugs as intermediate for preparing cytotoxic payloads, such as camptothecin series compounds