h1
h2
h3
h4
h5
h6
joining multiple rings!
[C]([Z]34[Y]45)([B]15[A]=[W]12)([X]23)2,3-dibromo-hex-2-enoic acid
OC(=O)C(Br)=C(Br)CCC3,4-dichloro-pent-3-en-1-amine
NCCC(Cl)=C(Cl)C5,5,5-triamino-2-fluoro-3-iodo-4-hydroxyl-pent-3-enoic acid
OC(=O)C(F)C(I)=C(O)C(N)(N)(N)2-amino-3-fluoro-4-hydroxyloct-6,7-dienoic acid
OC(=O)C(N)C(F)C(O)CC=C=C