1. The molecule comprises a five-membered ring with a sulfur atom at position 1, a nitrogen atom at position 3, and carbon atoms at positions 2, 4, and 5 (labeled S1, C2, N3, C4, and C5).
2. C2 bears a methyl substituent. Additionally, there are double bonds between C2 and N3, and between C4 and C5.
3. At C4, a side chain -CH2-CH2-N=C(O)-(...) is attached. The imine carbon (double-bonded to nitrogen) bears a further substituent described below:
   - This substituent begins with a methylene linked to a chiral carbon (S configuration). This chiral center carries a methyl group and a 1,3-difluorophenyl ring (with the two fluorines positioned in a meta each other on the phenyl), where the linkage carbon is numbered as position 4.
