9,9'-di-cis-zeta-carotene => 9,9',15-tri-cis-zeta-carotene
9,9'-di-cis-zeta-carotene => 9,9',15-tri-cis-zeta-carotene
9,9'-di-cis-zeta-carotene => 9,9',15-tri-cis-zeta-carotene
9,9'-di-cis-zeta-carotene => 9,9',15-tri-cis-zeta-carotene