Complex sentence: Its chemical formula is C 21 H 38 N 2 OS. The kalkitoxin carbon chain contains two double bonds, a ring system, which is in the natural form a 2,4-disubstituted thiazoline, and an additional carbonyl-group.
Split into simpler sentences: Its chemical formula is C 21 H 38 N 2 OS. The structure contains two double bonds, a 2,4-disubstituted thiazoline ring system, and an additional carbonyl-group.