Atom properties: Following properties are supported: charge, isotope, substituents, free sites, unsaturation, reaction stereo, enhanced stereochemistry, radical, ring bond count.

Element: The 'Element' type node is read as a single atom. For the supported properties see the supported Atom properties list.

Element List: Element Lists are read as Atom List (or not list). For the supported properties see the supported node properties list.

Label: Labels are converted to an S-group and imported in its contracted state.

Nickname: Nicknames are converted to an S-group and imported in its contracted state.

Bond types: Single bonds, double bonds, query bonds, topology, reaction centers are imported. See details.

Fragment

Generic Label: Generic Labels are read as Generic query atoms.

Attachment Points: Attachment Points are imported.

Reaction arrows: All types of arrows are imported, but only one arrow per file.

Bracketed groups: All groups are imported.

Alternative Group: Alternative Groups are read as R-groups, up to two connections per R-group.

Anonymous Alternative Group: An Anonymous Alternative Group is imported as R-group and is assigned the R-group number n+1 where n is the largest R-group number in the file.

R-logic

Link Node: Link Node is read as Link Node.

Variable Attachment and Multi-Center Attachment: These are imported as Multicenter S-groups.

Text Box: Marvin reads the position and the formatted text.

Basic Graphic Objects: Ellipses, rectangles and some of the symbols are read. See details.

Graphic Objects: Tables and TLC plate drawings are imported as graphics. See details.

Formatted text in atom labels: supported since 6.2.0.

ElementListNickname

ElectronFlow arrow

Complex graphical objects (e.g. laboratory equipment drawings, biological drawings)

Only ASCII characters are imported.

R-logic import is supported, export not yet.

Chemical structures

Formatted text

R-groups: R-logic is not supported.

S-groups

Atom and bond query properties

Rectangles, rounded rectangles and ellipses

Reactions