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US 6,388,078 B1Granted
S type 2-substituted hydroxy-2-indolidinylbutyric ester compounds and process for preparation thereof
AssigneeTanabe Seiyaku Co., Ltd.
InventorsTakayuki Kawaguchi, Sumihiro Nomura, Kenji Tsujihara
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Abstract
A camptothecin compound of the formula [XVIII]: wherein R4 is a lower alkanoyl group, R5 is an ethyl group, R7 is a —O(CH2)3NH2 group that may be protected by a —COOC(CH3)3 group, and R6, R8 and R9 are a hydrogen.
Claims1
A camptothecin compound of the formula [XVIII]:
- wherein R4 is a lower alkanoyl group, R5 is an ethyl group, R7 is a —O(CH2)3NH2 group that may be protected by a —COOC(CH3)3 group, and R6, R8 and R9 are a hydrogen.
Dependencies are inferred from the claim text.