preferred_name: 5-dehydro-4-deoxy-D-glucuronate + L-rhamnopyranose => 2-O-(4-deoxy-beta-L-threo-hex-4-enopyranuronosyl)-alpha-L-rhamnose + H2O
preferred_name_lc: 5-dehydro-4-deoxy-d-glucuronate + l-rhamnopyranose => 2-o-(4-deoxy-beta-l-threo-hex-4-enopyranuronosyl)-alpha-l-rhamnose + h2o
label: 5-dehydro-4-deoxy-D-glucuronate + L-rhamnopyranose => 2-O-(4-deoxy-beta-L-threo-hex-4-enopyranuronosyl)-alpha-L-rhamnose + H2O
label_lc: 5-dehydro-4-deoxy-d-glucuronate + l-rhamnopyranose => 2-o-(4-deoxy-beta-l-threo-hex-4-enopyranuronosyl)-alpha-l-rhamnose + h2o