EXO-DICYCLOPENTADIENE

(1α,2R,6R,7α)-Tricyclo[5.2.1.02,6]deca-3,8-diene

(1R,2R,6R,7S)-Tricyclo[5.2.1.02,6]deca-4,8-diene

(3aα,4β,7β,7aα)-3a,4,7,7a-Tetrahydro-4,7-methano-1H-indene