<https://bioinfoms.opengsi.org/2004-01-10-added-functional-group-descriptors/>
<http://schema.org/breadcrumb>
<https://bioinfoms.opengsi.org/2004-01-10-added-functional-group-descriptors/#breadcrumb>
<https://bioinfoms.opengsi.org/2004-01-10-added-functional-group-descriptors/>