Date Severity Status Feedback
Feb 15 2011 11:15PM Normal Acknowledged I apologise - apparently both numbering systems are in use for this compound. Crazy but true. The other isomer is known as 3,6-dihydropyran, and has a separate CSID. Sorry for the earlier comment.
No problem. I've encountered this issue myself before with other dihydropyran structures
Feb 15 2011 11:10PM Normal Acknowledged A lot of the "approved synonyms" here seem to be plain wrong. I'm not an expert on pyran numbering, but surely 2,3-dihydropyran (and variants) are right, and 3,4-dihydropyran or other numberings are either plain wrong or thet are different compounds? 3,4-dihydropyran is a valid compound, but it's not the same as this! Please check.
left as is based on your second comment