Assertion: d ribose | /r/HasProperty | natural product
Facets:
value: to the cognitive stimulants
type: OTHER
Source sentences:
text: It was not until 1909 that Phoebus Levene and Walter Jacobs recognised that d-ribose was a natural product, the enantiomer of Fischer and Piloty's product, and an essential component of nucleic acids.
text: D-Ribose is a natural alternative to the cognitive stimulants that are often unsafe for extended use.