About: http://webisa.webdatacommons.org/88977919

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	lar the residues R.sup.18,R.sup.20, R.sup.21 and R.sup.22 are alkyl residues with 1 to 4 carbon atoms, in particular 1 to 2 carbon atoms.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com