<http://webisa.webdatacommons.org/prov/108625818>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/347273318> .
<http://webisa.webdatacommons.org/prov/199800963>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/347273318> .
<http://webisa.webdatacommons.org/prov/393669195>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/347273318> .
<http://webisa.webdatacommons.org/prov/333848442>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/347273318> .
<http://webisa.webdatacommons.org/prov/488883393>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/347273318> .
<http://webisa.webdatacommons.org/347273318>	<http://www.w3.org/ns/prov#value>	"Preferably, R1 and R2 are each, identically or differently, a methyl or ethyl group and R3 is a hydrogen atom or a methyl group." .
<http://webisa.webdatacommons.org/347273318>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .
<http://webisa.webdatacommons.org/347273318>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .