title: New potato micro-tuber-inducing cyclohexene compounds related to theobroxide from Lasiodiplodia theobromae.
abstract: Two new cyclohexene compounds related to theobroxide (3) were isolated from the mycelia of Lasiodiplodia theobromae OCS71. The structures of these compounds were determined to be (4S,5S)-4,5-dihydroxy-2-methyl-cyclohex-2-enone (1) and (3aS,4R,5S,7aR)-4,5-dihydroxy-7-methyl-3a,4,5,7a-tetrahydrobenzo[1,3]dioxol-2-one (2) by means of spectroscopic analyses and chemical correlation to 3. Compound 2 was shown to take up the carbonate ion to form a carbonic acid ester non-enzymatically. The compounds also showed potato micro-tuber-inducing activities at a concentration of 10(-3) M, using a culture of single-node segments of potato stems in vitro.
authors.affiliation: Division of Applied Bioscience, Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Takei
authors.forename: Kosaku
authors.initials: K
authors.lastname: Takahashi
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Matsuura
authors.forename: Kensuke
authors.initials: K
authors.lastname: Nabeta
mesh_terms: D003510:Cyclohexanes / Q000737:chemistry*; D053138:Cyclohexenes / Q000737:chemistry*; D004852:Epoxy Compounds / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015394:Molecular Structure; D011198:Solanum tuberosum / Q000737:chemistry*
chemical_list: D003510:Cyclohexanes; D053138:Cyclohexenes; D004852:Epoxy Compounds; C496818:theobroxide; C052568:cyclohexene