<http://webisa.webdatacommons.org/prov/130983218>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/49805791> .
<http://webisa.webdatacommons.org/prov/464850953>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/49805791> .
<http://webisa.webdatacommons.org/49805791>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/49805791>	<http://www.w3.org/ns/prov#value>	"According to another embodiment of the process of the present invention, camptothecin derivatives of the general formula: ##STR8## wherein Y' is OH or the grouping OR3 where R3 is a lower alkyl group or an acyl group and Z is H or an acyl group, as well as water-soluble alkali metal salts are prepared by treating camptothecin with sulfuric acid and a persulfate in an aqueous medium containing a tr" .
<http://webisa.webdatacommons.org/49805791>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .