About: http://webisa.webdatacommons.org/242247795

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In a preferred sub-group, R1 is preferably ethyl and especially methyl, or the two groups R1 --(Y1)n -- together are pentamethylene, n in the group --(Y1)n --R2 is preferably 0,R2 is preferably methyl, hydroxymethyl or H and R is H.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com