SEARCH Articles Figures Tables 1.3- Oxazines dihydro-, conformations 2.3- Dihydro-1,4-dioxin, conformations 2.3- dihydro-, conformation 2 + 3]cycloaddition 3,4 -Dihydro-1,2-dithiin, conformations 3.6- Dihydro-27/-thiin, conformations Dihydro-1,4-thiazines conformation Furan 2.5- dihydro-, conformation