Search for "hydroazulenes" in Full Text gives 3 result(s) in Beilstein Journal of Organic Chemistry.
Beilstein J. Org. Chem. 2020, 16, 738–755, doi:10.3762/bjoc.16.68
Beilstein J. Org. Chem. 2012, 8, 693–698, doi:10.3762/bjoc.8.77
Beilstein J. Org. Chem. 2012, 8, 403–410, doi:10.3762/bjoc.8.44