The Saronic Gulf (Greek: Σαρωνικός κόλπος, Saronikós kólpos) or Gulf of Aegina in Greece forms part of the Aegean Sea and defines the eastern side of the isthmus of Corinth. It is the eastern terminus of the Corinth Canal, which cuts across the isthmus. The gulf includes the islands of Aegina, Salamis, and Poros along with smaller islands of Patroklos and Fleves. The port of Piraeus, Athens’ port, lies on the northeastern edge of the gulf.

Beaches line much of the gulf coast from Poros to Epidaurus, Galataki to Kineta and from Megara to Eleusis and from Piraeus down to Anavyssos. Athens’ urban area surrounds the northern and the eastern coasts of this gulf. Bays in the gulf include Phaleron Bay, Elefsina Bay to the north, Kechries Bay in the northwest and Sofiko Bay in the east. The volcano of Methana is located to the southwest along with Kromyonia at the Isthmus of Corinth, Aegina and Poros.

Pentarane A, also known as D’6-pentarane or pregna-D’6-pentarane, as well as 16α,17α-cyclohexanoprogesterone, 16α,17α-tetramethylenepregn-4-ene-3,20-dione, or 17α-acetyl-16β,24-cyclo-21-norchol-4-en-3-one, is a steroidal progestin that was developed by the Zelinskii Institute of Organic Chemistry of the Russian Academy of Sciences and was never marketed. The 6α-methylated analogue of pentarane A is known as mecigestone or as pentarane B.

The genus occurs in all of Africa, Madagascar and adjacent islands, southern Spain, the Middle East, Afghanistan, Pakistan, India, Sri Lanka, Thailand, Vietnam, southern China, Taiwan, the Ryukyu Islands, Malesia, and in Queensland, Australia. In the Afrotropical region the two main centers of diversity are in the south and the northeast. The genus includes some 102 species: Media related to Gymnosporia at Wikimedia Commons Andrew Huebner is an American author who lives in New York City.

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