Figure 1.

Structure of SL-1 and a synthetic analogue. The synthetic analogue of SL-1 is composed of a T2S core esterified with fatty acyl groups at the 2′, 3′, 6′, and 6 positions, similar to SL-1. However, due to the complex synthesis of the fatty acyl substituents found on the natural product, SL-A lacks the hydroxyl groups and multimethyl branched units found on SL-1.