mravljična kislina, produkti reakcije z boron trifluoridom in [lS-(l α,3aβ,4α,8aβ)]-dekahidro-4,8,8-trimetil- 9-metilen-1,4-metanoazulenom
F ormic acid, reaction products with boron trifluoride and [lS-(lα, 3a ß, 4 α, 8a ß)]-decahydro-4, 8, 8-trimethyl-9-methylene-l, 4-methanoazulene