passages.id: split_8_test_3195_passage
passages.type: progene_text
passages.text: The chalcone synthase ( CHS ) superfamily of type III polyketide synthases ( PKSs ) produces a variety of plant secondary metabolites with remarkable structural diversity and biological activities ( e.g. , chalcones , stilbenes , benzophenones , acrydones , phloroglucinols , resorcinols , pyrones , and chromones ) .