bicyclo 4.4.0 dec-1,3,5,8-ene

The compound "bicyclo[4.4.0]dec-1,3,5,8-ene" is a bicyclic organic compound with a total of 10 carbon atoms. It has a complex structure consisting of two fused cyclohexane rings and a double bond. The numbering system indicates the positions of the carbon atoms and the presence of a double bond.

The prefix "bicyclo" indicates that it contains two fused rings, while the numbers inside the square brackets indicate the number of carbon atoms in each ring. In this case, both rings are cyclohexane rings with 4 carbon atoms in each.

The name "bicyclo[4.4.0]dec-1,3,5,8-ene" further specifies that the compound contains a double bond between carbon atoms 1 and 8 in the decane backbone. The numbers 1, 3, 5, and 8 refer to the positions of the double bond within the fused cyclohexane rings.

Overall, bicyclo[4.4.0]dec-1,3,5,8-ene represents a specific arrangement of carbon atoms in a bicyclic structure with a double bond.