octtriacont should not have been lexed as two tokens

[Rg111Ga31]

Submission of : 4-((6R)-38-(3-mercapto-2,5-dioxo-1-azacyclopentan-1-yl)-2,5,8,36-tetraoxo-6-propan-2-yl-1,4,35-triaza-11,14,17,20,23,26,28,32-octaoxa-octatriacontan-1-yl)phenylmethyl 6-(1-((1R)-13-methyl-7-methoxy-10-oxo-3,11-diazatricyclo[9.3.0.0^{4,9}]tetradeca-2,4,6,8,11-pentaen-6-yl)-1,7-dioxaheptan-1-yl)-(S,2R)-13-methyl-7-methoxy-10-oxo-3,11-diazatricyclo[9.3.0.0^{4,9}]tetradeca-4,6,8,12-tetraene-3-carboxylate
for parsing elicits the title ERROR. I am attempting to create a Structure Based Systematic Heteroatom Replaced Polycyclo Name for tesirine which PubChem identifies {using access to the immutable default ring index demanded by IUPAC} as
[4-[[(2S)-2-[[(2S)-2-[3-[2-[2-[2-[2-[2-[2-[2-[2-[3-(2,5-dioxopyrrol-1-yl)propanoylamino]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoylamino]-3-methylbutanoyl]amino]propanoyl]amino]phenyl]methyl (6S,6aS)-3-[5-[[(6aS)-2-methoxy-8-methyl-11-oxo-6a,7-dihydropyrrolo[2,1-c][1,4]benzodiazepin-3-yl]oxy]pentoxy]-6-hydroxy-2-methoxy-8-methyl-11-oxo-6a,7-dihydro-6H-pyrrolo[2,1-c][1,4]benzodiazepine-5-carboxylate
Computed by Lexichem TK 2.7.0 (PubChem release 2021.10.14
Why will OPSIN not properly identify a 38 atom substituted hetero atom chain ? ? ?

[dan2097]

The error OPSIN is showing is misleading, it internally produces two different parse trees which differ as to whether octatriacont is parsed as [octa][triacont] or [octatriacont]. The first one gives the displayed error octtriacont should not have been lexed as two tokens!. The other, which unfortunately isn't displayed, gives the error Atom is in unphysical valency state! Element: N valency: 4

The name you gave appears to correspond to:
CC1C=[N]2C(C3=CC(=C(C=C3N=C[C@H]2C1)O(CCCCCO)C=1C=C2N(C[C@@H]3CC(=CN3C(C2=CC1OC)=O)C)C(=O)OCC1=CC=C(C=C1)NC(CNC([C@H](CC(CCOCCOCCOCCOCCOCCOCOCCCOCCNC(CCN1C(C(CC1=O)S)=O)=O)=O)C(C)C)=O)=O)OC)=O
which has a tetravalent nitrogen

Assuming you intended your name to describe tesirine an appropriate name in the style of your name would be:
4-((3S,6S)-3-methyl-38-(2,5-dioxo-1-azacyclopent-3-en-1-yl)-2,5,8,36-tetraoxo-6-propan-2-yl-1,4,7,35-tetraaza-11,14,17,20,23,26,29,32-octaoxa-octatriacontan-1-yl)phenylmethyl 6-(7-((1S)-13-methyl-7-methoxy-10-oxo-3,11-diazatricyclo[9.3.0.0^{4,9}]tetradeca-2,4,6,8,12-pentaen-6-yl)-1,7-dioxaheptan-1-yl)-(1S,2S)-2-hydroxy-13-methyl-7-methoxy-10-oxo-3,11-diazatricyclo[9.3.0.0^{4,9}]tetradeca-4,6,8,12-tetraene-3-carboxylate

As a by the by the IUPAC chemical name on PubChem is incorrect, the fused ring system pyrrolo[2,1-c][1,4]benzodiazepine is misnumbered. The ACD/Name generated name on https://www.chemspider.com/Chemical-Structure.64854234.html uses the correct numbering