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4.12.4.2  Complex Bridged Fused Systems 

If this check box is selected, bridged fused systems containing more than one trivalent or two 

bivalent acyclic bridges will be refused.  If this check box is cleared, all bridged fused systems will 

be named as Von Baeyer polycycles. 

For example: 

pentacyclo[5.5.5.0

2,6

.0

8,12

.0

13,17

]heptadecane 

4.12.4.3 Multiplicative Nomenclature 

For example: 

HO

OH

Cl

Cl

O

O

CH CH

3

3

IUPAC name: 

2,2  [(1,4 dichloro 2,3 dimethylbutane 2,3 diyl)bis(oxy)]diethanol 

ACD/Labs name: 

2 [3 chloro 1 (chloromethyl) 2 (2 hydroxyethoxy) 1,2 dimethylpropoxy]ethanol (non 

preferred name) 

The rest of the preference allows you to specify whether to use retained natural product and 

biochemical names for several classes of compounds.  This version allows you to use or avoid 

retained names for several dozens of basic natural product parent structures (steroids, alkaloids, 

terpenes, and some others), carbohydrates, common aminoacids, and peptides. 

4.12.4.4  Steroids, Alkaloids, and Terpenes 

CH

3

Cl

H

H

H

H C

3

CH

3

Yes 

14 chloropodocarpane 

No 

(4aR,4bS,8aR,10aS) 8 chloro 1,1,4a trimethyltetradecahydrophenanthrene

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