1. Core ring (numbered clockwise): A five-membered aromatic ring with atoms at positions 3 and 5 designated as carbons, and positions 1, 2, and 4 as nitrogens.
2. Substituents:
   - At C-3: A chain beginning with sulfur (S) directly attached to C-3, followed by three methylene groups (-CH2-CH2-CH2-), then an oxygen atom (-O-), and finally an isopropyl group (-CH(CH3)2).
   - At C-5: A six-membered aromatic ring containing two nitrogen atoms positioned opposite each other (i.e., a 1,4-diazine arrangement), with one of the nitrogen atoms adjacent to the ring carbon attached to C-5.
   - At N-4: An allyl group (-CH2-CH=CH2).