About: http://webisa.webdatacommons.org/50283377

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	ptional atoms selected from C, H, N, S, P and halogen atoms, with the proviso that the sum of the molecular weights of R1 and R2 is at least 40, and n is a positive integer, and having a molecular weight of at least 1,000.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com