sentence1: The monomeric phenanthrenoid 8,8 '- bidehydrojuncusol and the dimeric juncusol and dehydrojuncusol can be isolated from `` J. acutus '' .
sentence2: The dimer Phenanthrenoid 8,8 ' ; - bidehydrojuncusol and the monomeric Juncusol and Dehydrojuncusol can be isolated from `` J. acutus '' .